ML20199A003

Rept on Fire Resistant Cables, for Rockbestos Co,New Haven,Ct

ML20199A003
Person / Time
Site:	Prairie Island
Issue date:	04/10/1984
From:	Berhinig R, Howell K, Clay Johnson External (Affiliation Not Assigned)
To:
Shared Package
ML20198T458	List: ML20198T455 ML20199A003 ML20199A025 ML20199A049
References
R10925-1, NUDOCS 9801270087
Download: ML20199A003 (77)

Text

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'&y UNDERWRITERS LABORATORIES INC .

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File R10925-1 i

Project 84NK2320 April 10, 1984 3

REPORT l

en FIRE RESISTANT CABLIS

' The Rockbestos Company, Division of CEROCK Wire & Cable Group, Inc.

New Haven, Connecticut Copyright h 1984 Underwriters Laboratories Inc.

Underwriters Laboratories Inc. authorizes the above named company.

to reptoduce this Report provided it is reproduced in its entirety.

In no event shall Underwriters Laboratories Inc. be responsible to -anyone for whatever use or nonuse is made of the information contained in this Report and in no event shall Underwriters Laboratories Inc., its employees, or its agents incur any to, conse or liability for damages, including, but not limited obligation the use, quential damages, arising out of or in connection with Report. .

or inability to use, the information contained in this Information conveyed by this Report applies only to the specimens actually involved in these tests. Underwriters Laborttories Inc.

has not established a factory follow-up servico program to determina the conformance of subsequently produced material nor has-any provision been established to apply any registered mark of- Underwriters Laboratories Inc. to such material.

'The issuance of this Report in no-way implies Listing, 4 Classification cr other Recognition by Underwriters Laboratories .

Ir.c. and does not authorize the use of UL Listing or

. Classification Markings or any other reference to Undezvriters y Laboratories Inc.Lon or.in connection with the product or system.

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File R10925-1 Page i Issued: 4-10-34 .

hAs13sg5 This Report describes a testing program which was undertaken to develop information for the assessment of fire resistant cables in Redundant safety Trains as outlined in " Fire Protection Program For Operating Nuclear Power Plants" (Appendix R to 10 CFR 50) . The testing prwram consisted of a full-scale fire test investigation and an adjunct . .nall-scale fire test. These tests provided data on the electrical characteristics of the fire resistant cable samples under controlled fire exposure conditions and during an extended cool-down period.

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File R10925-1 Page 11 Issued; 4-10-84

-TAB

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Abstract................................................ 1 I Tab l e O f Co n t e n t s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 General.......................*......................... 1 D3scription............................................ 4 Materials.......................................... 4 Full-scale Test Assembly..................... 4 Small-Scale Test Assambly.................... 8 l Erection Of Te s t As s amblie s . . . . . . . . . . . . . . . . . . . . . . . . 8 i Full-Scale Test Assembly..................... 8 Small-Setle Te s t As s embly. . . . . . . . . . . . . . . . . . . . 14 ,

Test Record No. 1, Full-Scale Test Assembly. . . . . . . . . . . . 15 l Fi re Endu ran c e Te s t . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 t sample........................................ 15 Method........................................ 15 Results...................................... 17 i Character And Distribution Of Fire....... 17 Obse rvations During Te st . . . . . . . . . . . . . . . . . 17 1 Circuit Integrity....................... 18 l Initial Hose Stream Test............................ 18 4

Sample............................. .......... 18 Method............................. ......... 19 R4sults....................................... 19 Extended Cool-Down Period.......................... 19 s e co nd Ho s e S tr e am Te s t . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Sample.. ..................................... 20 Method....................................... 20 -

Rasults....................................... 20 '

t Ob se rva ti o n s Af t e r Te s t s . . . . . . . . . . . . . . . . . . . . . . . . . . . 20  ;

Discu8sion........................................ 21 Test Record No. 2, Small-Scale Test Assembly........... 25 Fire Endurance Test................................ 25 l Sample........................................ 25 Method....................................... 25 Re s u l t s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 Character And Distribution Of Fire....... 26 Observations-During Test................. 27 ,

Temperatures of The Cable s . . . . . . . . . . . . . . . 27 I Leaka 27 Summary. . . . . . . . . . . . ....................................

. ge Current Heasurements . . . . . . . . . . . . 30

_A _P _P _E _N _D _I _C _E _S 1-0 ypendix A, Electrical Circuit Measuraments, nll-scale Te s t As s ambly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Al Appendix 3, Insulation Rasistance Measurements,

-Full-Scale Test Assembly............................... B1 j Appendix C, Dielectric voltage-Withstand Tests, Full-$cale Te st As s aably . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C1 l

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File R10925-1 Page lii -Issued: 4e10 34 Appendix D, Cable Temperature Measurements, Small-Scale Test Assembly.............................. D1 Location Of The raccou ple s . . . . . . . . . . . . . . . . . . . . . . . . . 01 Tampera ture s of The cable s . . . . . . . . . . . . . . . . . . . . . . . . . D1 Appendix E, Instrument Calibration Records . . . . . . . . . . . . . . El Instruments supplied By Underwriters Laboratories Inc.................................. E1 -

Full-Scale Test Assembly...................... El Furnace Tamparature Recorder. . 3. . . . . . . . . El Automatic Dats Logger.................... El Ammeter.................................. El Voltage Source........................... El Water Pressure Gauge..................... El Sma ll-Scale Te s t As s embly . . . . . . . . . . . . . . . . . . . . . E2 Furnace Temperature Recorder............. E2 Cable Temperature Recorder. . . . . . . . . . . . . . . E2 Instruments Supplied By The Rockbestos Co. . . . . . . . . . E3 Full-Scale Test Assembly...................... E3 Digital Ammeter.......................... E3 l Meggering Equipment...................... E3 i

Small-Scale Te s t As sembly . . . . . . . . . . . . . . . . . . . . . E3 Digital Multimeters...................... E3 l

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File R10925-1 Page 1 Issued: 4-10-84 l

I 2EEEEbk The subject of this Report is the fire test investigation of fire resistant electrical cables installed in cable trays, conduits and air drops beneath a floor assembly. The purpose of '

the investigation was to develep information which may be used to

' determine whether the electrical cables manufactured by The Rockbestos Company meet the specifications for Redundant Safety Trains outlined in " Fire Protection Program For Operating Nuclear Power Plants" (Appendix R to 10 CFR 50).

information developed in this investigationWe understand that the is to be submitted I only to the United States Nuclear Regulatory Commission (NRC) , -

American Nuclear Insurers (AN1), Nuclear Mutual Limited (NML) and firms concerned with utility installations for their consideration as to the use of the Rockbestos cables in redundant safety trains nuclear as specified generating stationsin under Appendix the R to 10 CFR 50 for use in States Nuclear Regulatory Cocmission. jurisdiction of the United

' with various cable tray and conduit systems containing fireThe resistant cables. In addition, nonfire resistant cables were installed in the cable tray systems to simulate the fuel leading which would be-pres.nt in actual site installations. The flocr assembly was subjected to fire exposure with the furnace tamperatures controlled in accordance with the standard time-tamperature curve outlined in the Standard for Fire Tests of l Building Construction and Materials, ASTM E119 (UL 263, NFPA No. 25l).

subjected toFollowing the fire exposure, the assembly was the impact, erosion and cooling ef fect of a water 1

hose stream test. After an extended cool-down period, the j

assembly was subjected to a second water hose stream test.

Immediately before the fire endurance test, the fire resistant cables were energized with predetermined steady-state ac electrical currents.

the fire exposure except The cables remained energized throughout for a 10 s period immediatel L an inrush current test on each fire resistant cable. y preceding Folicwing the fire endurance test, the cables were deenergized for the water hose stream test. Following the water hose stream test, the cables were again energized with predetermined steady-state ac electrical currents. The cables remained energized throughout i a 93 h extended cool-down period except for 10 s periods l

immediately preceding each of four supplemental inrush current tests.

Following the 93 h extended cool-down period, the cables l were deenergized for the second water hose stream test.

Immediately following the second water hose stream test, the cables were subjected to a final inrush current test.

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File R10925 Page 2 Issued: 4-10-84 ,

'In addition to monitoring ac currents in each of the fire resistant cables, each conductor of each fire resistant cable was energized with a de voltage and monitored for electrical faults.

total of twelve configurations.A total of six fire resistant cable types were were included to develop information for consideration as to theNine use of the Rockbestos cables in redundant safety trains as specified in Appendix R to 10 CFR 50. The remaining three test configurations were included to develop engineering information of a preliminary nature for use by The Reckbestos Company. Only the data pertinent to the nine fire resistant cable safety trains, as specified in Apperdix R to 10 CFR 50, ar included herein.

are listed below: These nine fire resistant cable configurations

1. 3/C-No.

(Product Code E30-0211)14 AWG power cable with stainless steel sheath in conduit-to-cable tray transition.

2. 3/C-No. 14 AWG power cable with stainless steel sheath (Product Code E30-0211) in cable tray.

3.

.3/C-No. 14 AWG power cable without stainless steel sheath (Product Code E30-0208) in conduit.

4.

3/C-No. 6 AWG power cable with stainless steel sheath (Product Code E30-0210) in conduit-to-cable tray transition.

5.

3/C-No. 6 AWG power cable with stainless steel sheath (Product Code E30-0210) in cable tray.

6. 3/C-Ko. 6 AWG power cable without stainless steel sheath (Product Code E30-0204) in conduit.

7.

2/C-Oo. 14 AWG shielded twisted pair (S.T.P.)

instrumentation Code E30-U212) incable with stainless steel sheath (Product conduit-to-cable tray transition.

8.

stainless 2/C-No.14 AWG S.T.P. instrumentation cable with steel sheath tray. (Product Code E30-0212) in cable

, 9.

2/C-No.14 AWG S.T.P. instrumentation cable without stainless steel sheath (Product Code E30-0205) in conduit.

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File R10925-1 Page 3 Issued

4-10-84 L

rollowing the full-scale floor fire test investigation, a second fire test was conducted on two samples of the fire resistant cables installed beneath a 3 by 3 ft concrete floor slab. .iuring the small-scale fire endurance test, each of the fire resistant cables was energized with rated voltage and -

monitored to measure leakage current.

The fire andurance and hose stream tests were supplemented with other tests and examinations which provided additional information relative to the electrical performance characteristics of the fire resistant cables.

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File R10925-1 Page 4 Issued: 4-10-84 EEESEEETigy MATERIALS:

The following is a description of the materials used in the test assemblies.

FULL-SCALE TEST ASSEMBLY Floor Assembly - The floor assembly consisted of five separate steel-reinforced vermiculite concrete slabs. Two of the slabs measured 5 ft, 2 in. by 13 ft, 8 in by 8 in, thick. The remaining three slabs were 1 ft, 8 in, by 13 ft, 8 in. by 8 in, thick.

Cable Tray System - The nominal 24 in. wide open-ladder e-ble tray consisted of channel-shaped siderails and boxed-channel rungs. The siderails wara 6-1/2 in. deep and were formed of 0.082 in, thick (No. 14 gauge) galvanized steel. The top and bottom flanges of the siderail were 1-1/4 in. wide. The boxei-channel rungs were 1-1/8 in, wide by 5/8 in. deep and were formed of 0.066 in, thick (No. lo gauge) galvanized steel. The rungs were spaced 9 in. oc and were welded to the web of the siderails at each end. The loading depth of the tray was 5-3/4 in. The cable tray straight lengths were manu'actured by Metal Products Division, United States Gypsum Company and designated "GLOBETRAY" (Catalog No. PLED-SSO 9-24 00-6-12) .

The nominal 24 in, wide 90* inside vertical riser fittings used in the cable tray system each had an inside radius of 12 in., an outside radius of 18-1/2 in. , and a tangent length of 3 in. The siderail ===hars for each inside vertical riser were -

channel-shaped in cross-section with a web height of 6-1/2 in.

and a top and bottom flange width of 1/2 ia. The siderall members were formed of 0.082 in, thick (No. 14 gauge) galvanized steel. The inside vertical riser fittings were each provided with the same boxed-channel rungs used in the straight lengths.

The rungs were spaced nominally 6 in, oc and were welded to the web of the siderails at each end. The inside vertical riser fittings were manufactured by Metal Products Division, United States Gypsum Company and designated 'GLOBETRAY' (Catalog No. PLED-IV90-2 412-6) .

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File R10925-1 Page 5 Issued: 4-10-84 I

The ncainal 24 in. wide 90' outside vertical riser fittin  !

' used in the cable tray system had an inside radius of 12 in. , gan  !

outside radius of 18-1/2 in, and a tangent length of 3 in. The  !

siderail members were channel-shaped in cross-section- with a web l height of 6-1/2 in. and a top and bottom flange width of 1/2 in. l The siderail members were formed of 0.082 in, thick i (No. 14 gauge) galvanized steel. The outside vertical riser fittisg was provided with the same boxed-channel rungs used in the straight lengths of ceble tray. The rungs were spaced

, nominally 6 in. oC and were welded to the web of the siderails at i

each end. The outside vertical riser fitting was manufactured by

' Metal Products Division. United States Gypsus Company and designated "GLOBrTRAY' (Catalog No. PLRD-OV90-2412-6).

I The flat splice plates used to join the inside and outside vertical riser fittings with the cable tray straight sections consisted of 4 by 6 by 0.107 in, thick (No.12 gauge) galvanized steel plates. Each splice plate was provided with eight 3/8 in.

diameter by 5/8 in long slots which aligned with the four 3/8 in. diameter holes drilled at each and of the vertical riser

and straight section cable tray siderails. The splice plates were manufactured by Metal Products Division, United States j Gypsua Company and designated 'GLOSETRAY" (Catalog l No. F-RSPST-6-B). Each splice plate was provided with 3/8 in.

T diameter truss-head ribbed shank bolts and serrated flanged nuts.

Steel Conduit systans - The nominal 3 in. diameter Trade Size rigid steel conduits were 3.500 in. in diameter with a wall thickness of 0.216 in. Each of the three nominal 3 in, diameter rigid conduit systems consisted of two 90' elbows with threaded i

ands, one nominal 10 ft straight length with threaded ends, two i

straight lengths each having one threaded and, four threaded

steel couplings and two set-screw fiber bushings.

! The nominal 1-1/2 in, diameter Trade size rigid steel conduit used in the conduit-to-cable tray transition was 1.900 in.-in diameter with a wall thickness of 0.145 in. The conduit system consisted of ons 90' elbow with threaded ends, a straight length having one threaded end, two threaded steel

[ couplings and one set screw fiber bushing.

Tha nominal 3/4 in, diameter Trade size rigid steel conduits

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L used in the two conduit-to-cable tray transitions were 1.050 in.

'in diameter with a wall thickness of- 0.113 in. Each of the two conduit _ systems consisted of one 90' elbow with threaded ends, i

-one-straight length having one threaded and, two threaded steel couplingt and one set-screw insulated-grounding bushing.

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Fl'.e R10925-1 Page 6 Issued: 4-10-84

• The conduits and elbows each bore the UL Listing Mark. The straight conduit lengths and couplings were supplied by GPU Muclear Corporation, Parsippany, New Jersey. The conduit elbows and bushings were purchased locally.

Conduit Terminations - The conduit terminations used in -

conjunction with the nominal 1-1/2 in, and 3/4 in. diameter Trade

size rigid steel conduits for the conduit-to-cable tray transitions each consisted of a stainless steel compression shell, a brass grommet and a stainless steel coupling nut. The conduit termination fittings were manufactured by Rowe Industries, Toledo, Ohio and designated Type 3RT9006 (nominal.

1-1/2 in, diameter Trade Size fitting) and Type 2RT9006 (ncminal 3/4 in. diameter Trade size fitting) .

Trapeze Support - The trapeze supports each consisted of two nominal 1/2 in diameter threaded steel rods, an L4x3x1/2 in, thick structural steel angle and steel nuts.

Fire Resistant Cables - Six types of fire resistant cables were were:

included in the fire test assembly. The sLx cable types 3/C-No. 14 AWG with stainless steel sheath (Product Code E30-0211) ; 3/C-No. 6 AWG with stainless steel sheath (Product Code E30-0210); 2/C-No. 14 AWG shielded twisted pair (S .T. P. ) with stainless steel sheath (Product Code E30-0212);

3/C-No.14 AWG without stainless steel sheath (Product Code E30-0208); 3/C-No. 6 AWG without stainless steel sheath (Product Code E30-0204); and 2/C-No.14 AWG S.T.P. without '

stainless steel sheath (Product Code E30-0209) .

The six cable types designated Firewall FR SR Class 1E Electric Cables, were man,ufactured by The Rockbestos Company, Division of CEROCX Wire & Cable Group, Inc. , New Eaven, Connecticut. No marking was present on the cable jackets or shecths. ,

Fuel Leading cables - Four types of fuel loading cables were used in the cable tray systems. The cable types used were 3/C-No. 2 AWG power cables, 9/C-No. 12 AWG control cables, 19/C-No. 12 AWG control cables and 37/C-No. 12 AWG control cables.

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I' File R10925-1 Page 7 Issued: 4-10-84 Each conductor of the 3/C-No. 2 AWG power cable consisted of seven 0.097 in. diameter copper- strands stranded together and covered with a sylar wrap and cross-linked polyethylene- IXLPE) insulation. The outside diameter of each conductor was 0.403 in.

The fillers within the cable construction constsced of polyester strands. The fillers and conductors were encased in a tissue

.l paper wrap and covered with a Hypalon jacket. The outside diameter of the cable was 1.036 in. The cable jacket was marked

'2 AWG 3/C ROCKBESTOS R 600V FIREWALL R III XERW NEC TYPE TC

-(UL)."

Each conductor of the 9/C-No. II AWG cable consisted of i-seven 0.031 in, diameter copper strands stranded together and

- covered with ethylene prepylene rubber insulation and a hypalen

_- j s cha t . .The outside diameter of each conductor was 0.196 in.

The fillers within the cable construction consisted of polyester 1

strands. The fillers and conductors were encased in a seria paper wrap and covered with a hypalon jacket. The outside diameter of the cable was 0.858 in. The cable jacket was marked

'BCSTON-INSULATED WIRE AND CABLE COMPANY, (1980) 9/C-12 AWG, i

EPR/BYP INSUL, NYPALON JKT. 600 V."

Each cenductor of the 19/C-No. 12 AWG cable consisted of

! seven 0.029 in. diameter copper strands stranded together and covered with polyethylene insulation and a PVC jacket. The outside diamater of each conductor was 0.156 in. The conductors were encased in a sylar wrap and covered with a PVC jacket. The l outside diameter of the cable was 0.935 in. The cable jacket was marked ' ROME CT-3 CONTROL CABLE 19/C 12 AWG CU 600 V.

• Each conductor of the 37/C-No.12 AWG cable consisted of seven -0.030 in. diameter copper strands stranded together and j covered with XLPE insulation. The outside diameter of each conductor was 0.153 in. The conductors were encased in a sylar  ;

wrap and covered with a PVC jacket. The outside diameter of the cable was 1.250 in. The cable jacket was marked 'ROFI CABLE 37/C

, 12 AWG CU 600 V ELP TYPE B CONTROL CABLE.*

2 The-19/C- and 37/C-No. 12 AWG control cables were purchased locally.- The 3/C-No. 2 AMG and the 9/C-No. 12 AWG cables were

. supplied by GPU Nuclear Corporation, Parsippany, New Jersey. The real containing- the 3/C-No. 2 AWG cable bore a pressure-sensitive adhesive label reading 'GPU NUCLEAR TMI, Reel Number $2, B/M__,,

Footage 896', P,0. Number

, Data Received ,

! - 8.8.N. 118-764-2900-1.* The reel containing the 9/C-No. 12 AMG p

' cable bore a pressure-sensitive adhesive label reading 'GPU NUCLEAR TMI, = Real Number EJ0018, B/M FR-9JJ, footage 593 ' , P.O.

r Number 89145, Date Received 9-8-80, S.s.N. 113-753-7000-1.*-

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. Cable Ties - The ties used to secure the - fire resistant and

. fuel loading cables- in- place consisted of No. 14 SWG (0.080 in, diameter) steel wire ties and stainless steel cable straps. The

- stainless steel cable straps were purchased from Metal Products Division, United States Gypsum Company (Catalog Nos. CT-2000-SS

and CT-4375-SS).

SMALL-SCALE TEST ASSEMBLY Floor Assembly - The floor assembly consisted of a ncainal

, slab. 36 by 2 in. thick steel-reinforced normal weight concrete 36 by Fire Resistant Cables - Two cable types were used in the test assembly. The cable types u ed were 3/C-No. 14 AWG cable with stainless steel sheath (Product Code E30-0211) and 2/C-No.

14 AWG S.T.P. cable with stainless steel sheath (Product Code E30-0212) . The cable samples were cut from the same reels of cable used in the full-scale floor fire test assambly.

i Cable Ties - The ties used to band the coils of fire resistant cables were stainless steel cable straps purchased from Metal Products Division, United States Gypsum Company (Catalog No. CT-4375-SS) .

ERECTION OF TEST ASSEMBLIES:

l FULL-SCALE TEST ASSEMBLY l

' The full-scale floor fire test assembly was constructed in

'accordance with the methods specified by the submittor, as shown I

in ILLC. 1 through 9. The construction of the test assembly was L

! observed by members of the technical and engineering staff of Underwriters Laboratories Inc.

placed Nominal 6 by' along the 6 by 1/2 walls.of thein,test thick structural steel angles were frame such that the top of the i

horizontal leg was 8 in. below the top edges of the test frame.

The thenfive steel-reinforced installed in the test vermiculite frame. Prior concrete floor slabs-were

' floor slabs, nominal 1-1/4 in. . thick mineral-wool to installation of the batts wera placed seal. The over the structural steel angles to form a amoke and heat average bearing; of each floor slab on the structural c

oteel angles was.4-1/2 in.' A 6 in, separation was maintair.ed l between- adjacent floor slabs to accommclate the vertical legs of the cable tray and conduit systems, ,

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File-R10925-1 Page 9 Issued

4-10-84 of theTwo floor W4x13 slabs.steelThebeams, 17 ft long, were placed over the top beams rested on and were secured to the l

-projecting steel reinforcament of each slab 0>ottom chord of  :

l inverted Type 852 steel joists) to prevent differential deflection of the various slabs during fire exposure. '

The locations of the various cable trays and conduits in the  !

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floor assembly are shown in ILL. 1.

The trapeze supports for the cable trays and conduits were installed as shown in ILLS. 1, 2, 4 and 5. ,

The nominal 24 in, wide main cable tray system and the auxiliary cable tray receiving the tray-to-tray cable air drops were assambled and installed as shown in ILL. 2. The 24 in, wide main cable tray system was assembled with flat splice plates in conjunction with 3/8 in, diameter truss-head ribbed shank bolts and serrated flanged nuts. The main cable tray system and auxiliary cable tray were suspended from the trapeze supports.

In addition, the cable tray system was suspended by means of nominal 2 by 2 by 1/4 in. thick steel angles, 24 in, long, spanning across the projecting steel reinforcament of the floor slabs (bottom chord of inverted Type 8H2 steel joists) and welded  ;

to the cable tray siderails. '

The three nominal 3 in. diameter rigid steel conduit systems were assemblso cnd installed as shown in ILL. 4. The three conduit systans rasted on the trapeze supports and were additionally supported by means of nominal 2 by 2 by 1/4 in, thick steel angles, 24 in, long, spanning across the projecting ,

steel the reinforcement of the floor slabs and welded to the sides of conduits.

Prior to installation of the main cable tray systan, auxiliary cable tray and the three nominal 3 in. diameter rigid 4

steel conduits,,a nominal 1 in, thickness of ceramic fiber blanket was placed on the 3 in, wide bearing lag of the trapeze 4

support angle such that the cable raceways did not rest directly upon the steel trapeze abpports.

The two nominal 3/4 in, diameter rigid steel conduits and the nominal 1-1/2-in. rigid steel conduits for the conduit-to-cable tray transitions were installed as shown ILL. 5.

The elbow of each condui: rested on and was welded to the 3 in, leg of = the trapeze suppert ' angle. Each conduit was additionally supprted by means of nominal 2 by 2 by 1/4 in, thick steel angles, 24 in. long, spanning across the projecting steel

- reinforcement of the floor slabs and walded to the conduits.

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l The 6 ft, 9 in. long auxiliary cable tray was provided with a 41.5 percent fill of randomly-laid fuel loading _ cables. Each cable was cut into a 6 ft, 9 in. length and was laid flat in the cable tray. The type and quantity of fuel loading cables in the auxiliary cable tray are tabulated below:

Cable Cable

Insulation Jacket cable Type Material Material Cable 00 Quantity 3/C-No. 2 AWG ILP BYP 1.036 in. 16 pieces 9/C-No. 12 AWG EPR-KYP EYP 0.858 in. 16 pieces 19/C-No. 12 AWG PE PVC 0.935 in. 36 pieces 37/C-No. 12 AWG XLP PVC 1.250 in. 8 pieces The 3/C-No. 14 AWG, 3/C-No. 6 AWG and the 2/C-No. 14 AWG 5.T.P. cables with the stainless steel sheaths (Product Code E30-0211, -0210 and -0212, respectively) were installed in the bottom of the main cable tray system and air-dropped into the auxiliary cable tray as shown in ILLS. 1, 2 and 3. The stainless steel sheathed cables were secured to the rungs of the main cable tray system and to the top layer of fuel loading cables in the auxiliary cable tray with stainless steel cable straps. The 3/C-No. 6 AWG cable and the 2/C-No. 14 AWG S.T.P. cable were installed such that the stainless steel sheath was in contact with the siderall of both the main cable tray system and auxiliary cable tray. The 3/C-No. 14 AWG cable was installed along the longitudinal centerline of the main cable tray system and auxiliary cable tray.

After installation of the stainless steel sheathed cables, a l 41.5 percent fill of randomly-laid fuel leading cables was installed in the main cable tray system. The type and quantity )

of fuel loading cables in the main cable tray system was j identical to that installed in the auxiliary cable tray. The l fuel loeding cables were installed along the entire length of the i cable tray system beneath the flocr and terminated approximately  !

2 in, below th'e underside of the floor. The vertical runt of j cable in the main cable tray system were secured to the cable tray rungs with stainless stool cable straps and steel wire ties.

Each of the three fire resistant cables in the main cable tray systas passed through the floor and projected above the top of the floor.

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........___.-..........-w.* a An. uAameter conduit systems, as shown in ILL. 4. The west conduit system contained three 2/C-No. 14 AWG S.T.P. cables (Product Code E30-0209) . The ce.ter conduit contained two 3/C-No. 14 AWG cables and one 3/C-No. i AWG cable (Product Ccde E30-0208 end

-0204, respectively). ' a east conduit contained two 3/C-No. 6 AWG cables One 3/C-No._14 AWG cable (Product Code E30-0204 and -C: terpectively). Each cable was installed along the entire len :ach conduit system and projected approximately 2 fe . :h and of each conduit system. After installation of th: -he ends of each conduit on the unexposed side of tr.. vere stuffed with pieces of ceramic fiber blanke: c convective heat loss and smoke issuing from the cond;. the fire test.

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File R10925-1 Page 12 Issued: 4-10-84 One fire resistant cable was installed in each of the two nominal 3/4 in. diameter rigid steel conduits and in the nominal 1-1/2 in, diameter rigid steel conduit, as shown in ILL. 5. The fire resistant cable installed in the nominal 1-1/2 in, diameter rigid steel conduit was a 3/C-No. 6 AWG stainless steel sheathed cable (Product Code E30-0210) . The fire resistant cable installed in the west nominal 3/ 4 in, diameter rigid steel conduit was a 3/C-No. 14 AWG stainless steel sheathed cable (Product Code E30-0211) . The fire resistant cable installed in the east nominal 3/4 in, diameter rigid steel conduit was a 2/C-No. 14 AWG S.T.P. stsinless steel sheatnad cable (Product Code E30-0212). The portion of each fire resistant cable which entered the rigid steel conduit was stripped of its stainless steel sheath. The stainless steel sheathed portion lof each fire resistant cable protruding from the rigid steel conduit extended through the air and entered the main cable tray system as shown in ILL. 1. At its entrance into the main cable tray system, each fire resistant cable was secured to the top layer of fuel loading cables using stainless steel cable straps. The fire resistant cables extended through the flocr and projected above the top surface of the floor, with the ends of the cable secured to the rungs of the main cable tray system with stainless steel cable straps. The coaduit-to-cable tray transitions were accomplished using compression-type conduit terminations. For each transition, the conduit termination compressien shall was threaded into the conduit coupling at the and of the conduit elbow. The fire resistant cable, with stainless steel sheath removed and with the conduit termination coupling nut and grommet in place, was inserted into the candtit through the opening in the compression shell. The cut and of the stainless steel sheath projected approximately 7/8 in. into the open end of the i

compression shell. The small end of the brass grommet was flush with the and of the stainles i steel sheath. While restraining the compression shall from rotating, the coupling nut was brought forward and tightened onto the compression shell to 150 f t-lb.

The unsheathed portion of each fire resistant cable extended approximately 2 ft beyond the ends of the conduits on the unexposed side of the assambly. After installstion of the fire resistant cables, the end of each conduit on the unexposed side of the assembly was stuf fed with pieces of ceramic fiber blanket to minimize convective heat less and smoke issuing from the conduit during the fire test.

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File R10925-1 Page 13 Issued: 4-10-84 the nominal 6 in, wide slots -in the flooAfter s and cables, installation concrete as a firestop.First, vertical' legs of the various systems were

vermiculite ends at north and of assembly andreesix cablecable en assembly) 4 in, wide piece were of individually ceramic fiberwrapped blanket with a nominal 1 i at south end of blanket was secured in place with steel wire tithe ceramic fjbern, installed such that the bottom edg es and was wrap forms was were flush with placed the bottom beneath each surface slot, of theor. floe of the carrmic fiber the floor slab. Removeable stuffed between Small the pieces edges of of ceramic the forms fiber and blanket the c blwereflush with t:

1eakage of the vermiculite concrete. a es to minimize  :

each slot to act as reinforcement. nominal re wedged1/2 into in, diamete i

Portland cement, composed of five parts expanded vermiculite agg  !

gate to one part into the slots and struck with a trowelby bulk volume, :and ped mixed w3 the forms were removed from the After drying for 24 h, e of undersid the assembly.

horizontal the floor assembly were protected and vertical members of theand assembly eze supports beneath trapAs the a fin 1/2 in, diameter threaded steel rods actingThe protection on the i

members of the trapeze supports were as the each vertical wrapped wi h wire 1 in.ties. thickness of ceramic fiber e blanketah t

ld nominal layer of aaterial.

protection expanded steel leth to act as a mechThe a ceramic cxpanded steel lathThe protection of material applied 1 into theanical key for the consisted a nominal sonalite water Typeby MK-5 and applied hand. cementitious mixture . thicknesswhich of was mix t

the trapeze support consisted e horizontal of a membernomithick of structu thethe of Type steelNK-5 angle.comen'titious mixture applied tnal 1/2 in, thickness of o all exposed faces ossembly consisted spray-applied Type MK-5 camentitious of a nominal mixture 3/4 to 1 in, thickness r ofT sadurance test is shown in . ILLS.

the unex e ore the 6, 7fireand = 8The ap ILL .

The appearance of

9. pcsed surface before the fire endurance test is shewn in r

File R10925-1 Page 14 Issued: 4-10-84 SMALL-SCALE TEST ASSDGLY The small-scale floor fire test assembly was constructed in accordance with the methods specified by the submitter, as shown in ILL. 20. The construction of the test assembly was observed by members of the technical and engineering staff of Underwriters Laboratories Inc.

Nominal 25 ft lengths of the 3/C-No. 14 AWG and 2/C-No. 14 AWG S.T.P. stainless steel sheathed cables (Product Coda E30-0211 and -0212, respectively) were each formed into a coil having .ap outside diameter of approximately 28 in, and containing three coils of cable. Each coil was formed and held in position with four stainless steel cable straps, as shown in ILL. 20.

Four nominal 1 in. diameter holes were drilled in the nominal 2 in, thick concrete slab to accommodate the four ends of the two cable coils. The free ends of the cable coils were inserted in the holes as shown in ILL. 20. Two nominal 3/8 in.

diameter holes were drilled in the nominal 2 in. thick concrete slab and a No. 8 SWG (0.162 in. diameter) galvanized steel wire was threaded through the holes and through the two coils of cable with the two ands of the wire twisted together on the top (u.narposed) side of the concrete slab to suspend the coiled cables. The four cable ends were additionaHy supported on the top side of the floor by means of short lengths of steel channel in conjunction with steel wire ties. Each of the six holes in the concrete slab was stuffed with small pieces of ceramic fiber blanket.

The and of each cable projec:ed approximately 30 in, above the top surface of the floor.

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, File R10925-1 Page 15 Issued: 4-10-84 TEST RECCRD N O. 1 IEkk-ISAh! IIII A11!5111 FIRE ENDURANCE TEST:

The fire endurance test was conducted with the furnace temperatures controlled in accordance with the Standard for Fire Tests of Building Construction Lad Materia.'s, ASTM E119 (UL 263, NFPA No. 251) .

SAMPLE The fire endurance test was conducted on the full-scale test assembly constructed as previously described in this Report under the section entitled " Erection Cf Test Assemblies' and as shown in ILLS. I through 9.

The installation of the cable raceways, conduits, fire resistant cables and fuel loading cables was completed approximately seven days before the fire endurance test was conducted.

METHOD The standard equipment of Underwriters Laboratories Inc. for testing floor assemblies was used for the fire endurance test.

The temperatures of the furnace chamber were measured by 16 theraccouples which were placed 12 in, from the underside of the floor assembly, located as shown in ILL. 10.

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File R10925-1 Page 16 Issued: 4-10-24 Each conductor of the nine fire resistant cable configurations was energized with a low voltage ac electrical  ;

current and monitored during the fire endurance test. The electrical current driving and metering plan for each fire resistant cable is shown in ILL. 11. Each conductor of the three conductor power cables (Product Code E30-0204, -0208, *0210 and

-0211) was provided with a jumper between its two ends which was fit *,od with a driver transformer set and a metering transformer, as shown in ILLS. 12 and 13. The characteristics of the driver transformer circuit and its associated variable transformer were such that all conductors of each three conductor cable had a common driver transformer set controlled by a single variable transformer, as shown in ILLS. 15 and 16. The control range was such the 3/C-Ho.that currents in the range of 3 to 21 A could be achieved on 14 AWG cables and 20 to 120 A ould be achieved on the 3/C-No. 6 AWG cables. The 2/C-No. 14 AWG S.T.P.

Instrumentation similarly connected. cables (Product Code E30-0209 and =0212) were However, the conductors ed, all of the two conductor cables were driven by a common transformer (three test sacple cables plus cae engineering sample cable for a total of eight conductors), as shewn in ILLS. 14, 15 and 16.

The predetermined stead -state and inrush current values for the 3/C-Wo. 14 AWG Power cabfas were 3.4A and 21A, respectively.

The predetermined steady-state and inrush current values for the 3/C-No.

The 2/C-No. 6 AWG power cables were 19.8A and 120A, respectively.

14 AWG S.T.P. instrumentation cables were each L

energized range of 1 to 2 A.

with a simulated ' pilot" current in the approximate i

Before the start of the fire endurance test, each cable was l

energized at ite predetermined steady-state current. As the fire endurance test proceeded, the output of the variable transformer was increased to maintain F.he steady-state currents as compensation for the increase in circuit resistance caused by the l normal resistance versus temperature characteristics of the conductor exposed to the fire. During the last 15 min of the fire portien offor doenergized the10test,

s. each three conductor power cable was rapidly adjusted to an in ush value.After 10 s, the current was reapplied and i

for 30 s and then ra The inrush current was held l steady-state value. pidly decreased to the predetermined Y

l - - - . - . - . _ - . . - - _a_.___-.- __ - . . _ _ -

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File R10925-1 Page 17 Issued: 4-10-84 In addition to the low voltage ac electrical current applied

to each conductor of the nine fire resistant cable configurations, each fire resistant cable was energized with a de voltage and monitored continuously for electrical faults (conductor-to-conductor, conductor-to-sheath / ground, conductor-to-shield and shield-to-sheath / ground). The details of the electrical fault monitor circuitry are shown schematically in ILL. 17. The electrical fault monitor panel was connected to an automatic data logger which scanned each circuit and provided a printed record to show electrical faults.

Throughout the fire test, observations were made of the character of the fire and its centrol, the conditions of the exposed and unexposed surfaces, and all developments pertaining to the performance of the fire rosistant cabler with special reference to circuit integrity.

R2SULTS Character And Distr dution Of Fire - The fire was luminous and well-distributed. As shown in ILL. 10, the furnace temperatures followed the standard time-tamperature curve as outlined in the Standard, ASTM E119 (UL 263, NFPA Wo. 251) during the first 10 min of fire exposure. Thereafter, the heat l

contributed from the burning fuel loading cables in the main cable tray system and the auxiliary cable tray caused the furnace l temperatures to exceed the standard time-temperature curve.

Observations During Test - On the exposed side of the test assembly, the fuel loading cables in the auxiliary cable tray I

ignited at 40 s.

The fuel leading cables in the main cable tray system were sacking at 1 min, 30 s and,- at ' 2 min , 15 s , the cables ignited. By 3 min, 30 s, the fuel leading cables in the main cable tz'ay system and auxiliary cable tray were engulfed in flame and were smoking profusely. The profuse flaming and smoking of the fuel loading cables continued throughout the fire

. exposure test. At 40 min, it was noted that the galvanized coating on the cable trays and conduits was oxidized. During the final 20 min of fire exposure, the cable tray siderails bowed inward and several of the cable tray rungs disengaged front the cable tray. siderails and allowed the fuel loading cables to l deflect downward.

I on the unexposed side of the test assembly, white sacke ccamenced. issuing from the ends of the fire resistant cables at 4 min. The smokir.g continued until 30 min. Thereafter, no significant changes c: curred on the unexposed side of the test l1 assembly. The furnace fire was extinguished at 60 min. j l)

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File R10925-1 Page 18 Issued: 4-10-84 -

Circuit Integrity - During the fire exposure test, each conductor of each fire resistant cable carried its steady-state electrical current. During the fire exposure, it was necessary to "tria" the variable transformer to maintain the test current.

Commencing at 47 min, each three conductor power cable was deenergized for 10 s. The current was then reapplied to each l cable and rapidly adjusted to the maximum current attainable and held for 30 s. The voltage output from the variable transformer was not sufficient to attain the predetermined inrush current level in any of the power cables due to the increased resistance of the conductors. After the 30 s inrush current test, the current was reduced to its steady-state value. The electrical current measurements recorded during the fire endurance test are contained in Appendix A.

During the fire endurance test, some of the light emitting diodes (LED's) in the electrical fault monitor panel commenced glowing visibly after 12 min of fire exposure. By 25 man, all of the LED's were illuminated at various degrees of brightness.

However, at that tima, no electrical faults were indicated by the automatic data logger monitoring current flow through the LED's.

As the test progressed, the brightness of the LED's increased and the current flow through the LED's registered on the automatic data logger.

Following the fire endurance test, the electrical fault monitoring circuitry was analyzed. Based on this analysis described in the section of this Test Record entitled l " Discussion," it was determined that no electrical faults occurred in any of the nine fire resistant cable configurations during the fire endurance test. Rather, it was determined that i the illumination of the LZD's during the fire endurance test was an indication of leakage currents caused by the tamperatura effect on insulation resistance.

INITIAL HOSE STREAM TEST:

SAMPLZ The hose stream was . applied to the exposed surface of the i floor assembly. The hose stream test cosamenced approximately L 5 min, 30 s after the furnace fire was extinguished.

METHOD At the conclusion of the fire exposure, the fire resistant cables were deenergized and the test assembly was lifted from the s

furnace - and moved -to the hose stream area.

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File F.10925-1 Page 19 Issued: 4-10-84 The cable trays, conduits and cables were subjected to the action of a water hose stream applied for a duration of 90 s.

The hose stream was applied with an electrically-safe fog nozzle (set at a 30' included angle) at a perpendicular distance of and on a line ap17 ft, 3 in, from the center of the test assembly approximately of the assembly. proximately The water pressure 27' from measured a line normal at the to the inletcenter of the 1-1/2 in diameter hose 50 ft upstream of the nozzle was 105 psi.

Following the 90 s water hose stream test, subsequent applications of water were necessary to supprese flaming of the fuel loading cables in the main cable tray system and in the auxiliary cable tray.

RESULTS Upon suppression of all flaming of the fuel loading cables, current was applied to each of the nine fire resi:Mant cable configurations.

carried its steady-state Each conductor electricalofcurrent.

each fire resN -nt cable i

At the conclusion of the fire endurance test, all or the electrical fault monitoring circuits had been switched off.

Following the water hose stream test, all of the electrical fault monitoring circuits were reenergized. At that time, a low current (1 mA) electrical fault (dia LED) was indicated between i the shield and sheath of the 2/C-No. 14 AWG S.T.P.

instrumentation cable tray system. cable with stainless steel sheath in the main No other electrical faults were indicated.

EXTENDED COCL-DOfN PERIOD _:

At the conclusion of the fire endurance test and initial water hose stream test, the predetermined steady-state electrical currents configurations.

were reapplied to each of the nine fire resistant cable The cables remained energized throughout a 93 h extended cool-down period except for 10 s periods immediately preceding each of four supplemental inrush current tests. The electrical current measurements recorded during the extended cool-down period are contained in Appendix A.

File R10925-1 Page 20 Issued: 4-10-84

• In addition to monitoring current in each of the nine fire resistant cable configurations, each fire resistant cable was energized with a de voltags and monitored for electrical faults during the 93 h extended cool-down pe:iod. To monitor circuit integrity in the absence of an operator (at night), the electrical fault monitor panel was connected to an automatic data icgger which scanned each circuit at 55 min intervals and provided a printed record to show electrical faults. No electrical faults occurred during the extended cool-down period.

SECOND EO6E STREAM TEST:

SAMPLE The hose. strea:n was applied to the exposed surface of the floor assembly. The hose stream test consnenced approximately 93 h after the fire endurance test was completed.

METHOD At the conclusion of the 93 h extended cool-down period, the fire resistant cables were deenergized (except for de voltage used to monitor cables for electrical faults) and the cable trays, conduits and cables were subjected to the action of a water hose stream applied for a duration of 90 s. The hose stream was applied with an electrically-safe fog nozzle (set at a 30* included angle) at a naw4=n= distance of 5 ft from each of the cable trays, ccaduits and cables. The water pressure measured at the inlet of the 1-1/2 in, diameter hose 50 ft upstream of the nozzle was 100 psi.

RESULTS During the hose stream test, no electrical faults occurred in the fire res'istant cables.

Upon completion of the hose stream test, current was applied to each of the nine fire resistant cable configurations. Each conductor of each fire resistant cable carried its steady-state electrical current. A final inrush current test was conducted approximately 3 min after the hose stream test was completed.

The electrical current measurements recorded during the final

, inrush current test are contained in Appendix A.

OBSERVATIONS AFTER TESTS:

The appearance of the exposed surface of the test assembley -

3 after all testing was completed is shown in ILLS. 18 and 19.

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4 on the expoked side of the assambly, the three ncainal 3 in, a 4

diameter rigid steel conduit systems and the three conduits used '

_for the condult-to-cable tray transitions were oxidized but were 1 otherwise unchanged.

j The main cable tray system and auxiliary cable tray were essentially destroyed. A majority of the cable tray rungs were disengaged from the cable tray siderails at one or both ends such a

that the mass of fuel loading cables was supportsd by the trapeze

' supports and by the fire resistatt cables which penetrated the floar assembly at the two ends of the main cable tray system.

Apf oximately 80 percent of the insulation and jacketing

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materials on the fuel loading cables had been consumed during the fire. endurance test.

The stainless stee sheathed fire resistant cables in the main cable tray system id in the conduit-to-cable tray i transition were displac 1 due to the disengagement of the cable i

tray rungs and the resu. ant downward movement of the fuel i loading cable mass. Wit.. the loss of support from the cable tray rungs, the fuel loading cable mass along most of the main cable i tray system run was suspended from the stainless steel sheathed fire resistar.t cables. The stainless steel sheath on each of the fire resistant cables did not appear to be damaged by the applied stresses.

4 i The cementitious mixture protection material on the underside of the floor assembly and on the trapeze supports was partially dislodged by the water hose stream tests. Beneath the

! protection material, the floor assembly and trapese supports L

remained structurally sound.

Other than discoloration of the fire resistant cable ends e and the vertical legs of the cable raceways, no changes were noted in the appearance of the unexposed surface of the test L assembly.

. DIscOSSIcer:

During the fire endurance test, some of the light emitting diodes (LED's) in the electrical fault monitoring panel comumenced glowing. visibly after 12 min of fire expor tre. By 25 min, all of the LED's were illuminated at various- degrees of brightness.

_Rowever, at that time, no electrical faults were indicated by the automatic data logger which monitored current-flow through the LED's. As the test progressed, the brightness of the LED's

. increased.and-the current flow through the LED's became sufficiently high to register on the automatic data logger.

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File R10925-1 Page 22 Issued: 4-10-t Following the fize endurance test and the initial water hose stream test, the only electrical fault indicated on the electrical fault monitoring pa..el was a dim glow of the LED's associated with the shield and sheath of the 2/C-No. 14 WG S.T.P. instrumentation cable in the main cable tray syt m. The current flow through the two LID's was not sufficient tw register on the automatic data logger.

During the extended cool-down period, the electrical fault monitoring circuitry was amalyzed to discern the cause of the ancmalous electrical fault indications during the fire endurance tesu.

The electrical fault monitoring circuitry depicted schematically in ILL. 17. As shown, a de voltase of 120 V is connected to a voltage divider. Wo LID's are evnnected to the voltage dividar at multiple points. The forward diode is yellow and the reverse diode is red. The outboard end of the diodes ia connected to the test points (i.e., conductor, shield, sheath and/or ground). Can an ch:nic path is established between any two test points, the associated current flows between the LED's to indicate the nature of the electrical fault. Dependent upon the orientation of the LED's along the voltage divider, the level of current flowing between the LZD's associated with two test points ranges between 17 and 104 mA under electrical fault conditions.

The automatic data logger m:nitoring current flow through the LED's was configured to indicate 0 percent up to 4 mA, 100 percent at 20 mA and "ov2rrange" at anything over 20 mA in the forward direction. Over 20 mA in the reverse direction would also indicate an 'overrange" ccndicion.

Based on technieni infor=ation provided by the manufacturer of the LED's used in the electrical fault monitering panel, it was thought-that a de current in tha range of A6 to 45 M was required to illuminate the LED's. Rcwever, it was found that a de current of 0.1 mA was sufficient to caust. a visible glow in the LED's.

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File R.0'25-1 Page 23 Issued: 4-10-84 ,

e

' Based en the above iu conjunction with a review cf the printed record of current flow through the LED's duung *he fire endurance test, it was datarained that no electrical faults escurred in any of the nine fire resistant cable configurations.

Rather, the illumination of th1 LED's during the fire endurance test was determined to be an indication of leakage currents caused by the temperature effect on insulation resistance. Since the decrease :. insulation resistance witn temperature is reversible, no illumination c! the LED's occurred after the assembly had been cooled by the water hose stream test. The only exception the 2/c-po was the LED's assc41sted with the shield and sheath of .

tray system. 14 AWG s.T.P. instrumentation cabir in the main cable As indicated earlier in this discussion, the LEJ's ,

associated with the shield r.nd sheath of the 2/ -No. 14 AWG d.T.P. insexumentation cable in the main cable tray system i

' continued to elov visibly folicwing the initial water hose stream test. Approdsately 24 h after the fire endurance test was i

completed, the current flow through the LED's was measured with a Simpson Model 260 Volt-Cha-M1111aamneter and wac found to be 1 mA.

Approximately 72 h after the fire endurance test had been completed, but was verythe illumination of the LED's was still perce ptible faint.

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The measured current flow through t1e LED's at that time was 0.1 mA.

The level of current flowing between the LED's associated with the shield and sheath of the 2/C-No.14 AWG 5.T.P.

instrum a tatica cable in the main cable tray system under anchanically induced electrical fault conditions was in excess of l 20 mA. However, t*1e measured current flow throv7h the LED's in question was only 1 mA. Upon further cooling and drying of the i

! assembly, had dropy:dthe to measured current flow through the LED's in question 0.1 mA. These

observations nend to substantiate t% detaraination that no electrical faults occurred in the 2,C-No.14 AWG S.T.P. instrumentation cable and that the illumination of th', LED's in question reflected ler.kage current betwisen the shield and sheath, e

c faultsTo further were substantiate present the fire in the nine determination that no electrical resistant cable e h

configurations, insulation resistance u.1 dielectric witage-withstand tests were conducted on each conductor of the L aine cables. The results of the insulation rasittance and i

dielectric voltage-withstand tests are contained in Appendices 3 and C, respectively.

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File R10925-1 Page 24 Issued: 4-10-84 secause of the scale of the test assembly and sifety considerations involved, it was deemed inadvisable to conduct the full-scale fire test investigation with the cables energized at rated voltage. Instead, the cables were energized only at rated current with a supplemental low voltage de electrical fault monitoring circuit. In order to determine the levels of leakage current present in the fire resistant cables under fire exposure conditions with the cables energi:ed at rated voltage, a second fire test investigation was conducted, as described in Test Record No. 2.

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File R10925-1 Page 25 Issued: 4-10-84 TEST REC )RD N 0. 2 EEbhh"*EbEE EEEE b$$EUEhE

FIRE ENDURANCE TEST:

, t The fire endurance test was conducted with the furnace temperatures controlled in accordance with the Standard for Fire Tests of Building Co.sstruction And Materials, ASTM E119 (UL 263, NFPA No. 251) .

a SAMPLZ The fire endurance test was conducted on the small-scale test assembly constructed as described previously in this Report under the section entitled

• Erection of Test Assemblies' and as shown in ILL. 20.

The installation of the fire resistant cables in the concrete floor slab was completed approximately 18 h before the fire test was conducted. The humidity of the concrete slab was less than 75 percent at the time of the fire test.

METHOD The assembly was tested on a horiznntal exposure furnace, as tehown in ILL. 21. The furnace temperatures were measured by three thermocouples symmetrically located 12 in'. below the exposed surface of the floor slab.

l The temperatures of each coil of fire resistant cable were measured by two thermocouples affixed to the stainless steel sheath with stainless steel cable straps and located as shown in Appendix D, ILL. 01.

The fire resistant cables were connected to a test par.el and three-phase power supply as shown in ILLS. 22, 23 and 24. The power supply was adjusted to provide three-phase Y voltages of 480/277 Y ac. At room temperature (approximately 70 'F) the ciceuit was energized and charging currents were measured. Since only one test panel te.r available, the 3/C-No. 14 AWG power cable

, was energized continuously throughout the fire endurance test i

except for brief periods when it was disconnected to make

( seasurements on the 2/C-No.14 AWG S.T.F. instrumentation cabla.

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File R10925-1 Page 26 Issued: 4-10-84 Throughout the fire test, observations were made of the character of the fire and its control, the conditions of the exposed and unexposed surfaces, and all developments pertaining to the performance of the fire resistant cables.

RZSULTS Character And Distribution of Fira - The fire was luminous and well-distributed, and the furnace temperatures followed the standard time-temperature curve as outlined in the standard, ASTM E119 (UL 263, NFPA Wo. 251), and as shown in the following table:

Test Temperature, 'F Average Time, (ASTM E119 Time- Furnace min Temperature Curve) Temperature, 'F 1 285 400 2 500 645 3 670 725 4 860 760 5 1000 1000 6 1110 1145 7 1180 1180 8 1230 1240 9 1260 1270

, 10 1300 1300 15 1399 1400 20 1462 1445 25 1510 1500' 30 1550 1550 35 . 1584 1580 40 1613 1620 45 1638 1640 50 1661 1670 55 1681 1690 60 1700 1700 65 1718 1710

< 70 1735 1735 75 1750 1750 78 1759 1760 9

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File R10925-1 Page 27 Issued: 4-10-84 1

observations During Test - on the exposed side of the test assembly, no changes were noted in the appearance of the fire

, resistant cables other than discoloration of the stainless st',el i sheaths.

on the unexposed side of the test assembly, white smoke  !

cosamenced issuing from the ends of the fire resistant cables at 4

3 min. The smoking continued until 30 min. Other than discolocation of the e.ble ends and a slight " dishing

• of the concrete floor slab, no significant changes were noted in the appearance of the unexposed surface during the remainder of the fire test. The furnace fire was extinguished at 70 min.

Temperatures of The cables - The tamperatures measured by the various thermoccuples on the fire resistant cables were measured at 1 min intervals during the fire test. These temperatures are tabulated in Appendix D, 11J.,S . D 2, D 3 and D 4.

Leakage current Measurements - During the fire endurance test and after the fire endurance test was completed, the leakage, currents in ese.h fire resistant cable were measured while energized at rated voltage. The applied voltages and leakage currents were measured using four Beckman 3010 Digital Multimeters supplied by The Rockbestos company, Af ter 1 h o f fire exposure, each cable was subjected to an overvoltage condition (960 V ac phase-to-phase) for a minimum of 2 min and l supplemental leakage current measurements were obtained. The l leakage current measuremants recorded during the fire test ,

investigatien are shown in the following tables:

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Fila R10925-1 Page 28 Issued: 4-10-14 r

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47 1640 13.anA  % QaA 10.2aA 12.8mA 12.4mA 9.49aA M 1640 24.2aA h.@ 18.3aA 23.9mA 23.4a4 18.0mA 63 170$ 42.7aA -}( E 32.9mA 42.1mA 41.4a4 32.6mA 97+ &M 110uA 11 4 64eA 116eA 11SuA T3eA 1

1/C = les.16 Asc $.t.P. lastruneatetica ?461e V/$teinless $ teel Sheath (D0-0212) feet 7tas, Avg. Furnace taaksee Curreat. Cadr. - Dield t.eeksee Carroat. Cade. - Cade, efa fees.. 'F mite Conductor Sleet Condwter Dita Gmeueter Oleek Coadwter 0 70 97.GuA 99.1uA 11thA 110uA 26 1945 0.9dmA 0.44mA 0.93aA 0.83mA 15 1580 4.21mL 3.6SmA 4.04mA 3.ShA 49 1870 13.2mA 21.3mA 22.9mA 21.0aA

&l 171f' 60.9aA $9. dea 60.naA $9.1mA 10k 400 10thA 1939A

• 112uA 112uA i

l *

• Fernese fire eattaguished at 78 sin. Laekage current seasuremente taken with test sample leested in turnese.

SUPP1heptfAL LEAEAGg Outworf (AsumpqDris (APolied Vettege 960 V ee 3 Phase 7,155 Y se Grouns)++

1/C tes.14 Auc Peaer Cette V/Stef atwa Steel Sheath (D0-0211) feet 7tse, Avg. Furnese Leeksee Curreet, phav-Creune Laaksee heret. Phase-0etta

! ein fame. 'F M SttoCner.11wtCaer. M mito Cade. 31gh f..dr.

48 1728 127aA 134mA tenA 100aA 110mA 44aA i

l/

l

_ . . _ . . , , . s - - . _ _ _ , . - _ . _ . . . , . - . _ . _ , . . , _ _ _ . , _ . . - . . , , , _ - . . , , , - - . _ . . - . _

__c

File R10925-1 Page 29 Issued: 4-10-84 f /C = the . 14 Auc S , f. P. Inst'rumentatten Cett e V/St ef aless Steel Sheath ([30-0717) fest flee, M . Furnece Leeksee Current. CMr. = Steld . (seksee Current. Caer.

• CMr.

ein feue 'F Dfte Candvetor 31eck Candvetor ette Candvetor Sleet Cenevetse 75 1730 163aA 162mA 134mA 13W

++ = MtgN voltepe applied and held for einlaus ! sin for e6ch leekage current ase6urement.

As a supplement to the above, the leakage current between

~

i the shield and the sheath of the 2/C-No.14 AWG S.T.P.

instrumentation cable sas searured t.fter approximately 75 min of fire exposure. With an appliad vo.itage of 10 V ac, the leakage current was 113 mA. With an app 1!sd voltage of 180 V ac, the leakage current was 2000 mA.

In addition, the insulation resistance between the shield and sheath of the 2/C-No. 14 AWG S.T.P. instrumentation cable was measured during and after tha fire endurance test. The insulation resistance measurements recorded during the fire test investigation are sh;wn in the following table ,

Test Time, Average Tarnace Shield-Sheath min Temperatura, ' F, Insulation Resistance 27 1525 17 kilohns 56 1695 2.1 kilches 75 1750 3.5 kilohns 103 600 100 kilohns e

File R10925-1 Page 30 Issued: 4-10-84 8E555I1 l In consideration of the nature of this investigation, the foregoing Report is to be construed as information only and 1

shouhd not be regsrded as conveying any conclusions or i recomumendations or the part of Underwriters I.aboratories Inc. i regarding the acceptability of the fire resistant cables for use in redundant safety trains, as specified in Appendix R to 10 CPR 50, or for any other purpose.

A total of six fire resistant cable types were installed in a total of nine configurations beneath a full-scale floor assembly. The nine fire resistant cable configurations are listed below:

1. 3/C-No. 14 AWG power cable with stainless steel sheath 4

(Product Code E30-0211) in conduit-to-cable tray transition.

2. 3/C-No. 14 AWG power cable with stainless steel sheath (Product Code E30-0211) in cable tray.

3. 3/C-No. 14 AWG power cable without stainless steel sheath (Product Code E30-0208) in conduit.

4. 3/C-No. 6 AWG power cable with stainless steel sheath (Product Code E30-0210) in conduit-to-cable tray transition.

5. 3/C-No. 6 AWG power cable with stainless stsel sheath (Product Code E30-0210) in cable tray.

6. 3/C-No. 6 AWG power cable without stainless steel sheath (Product Code E30-0204) in conduit.

7. 2/C-No.14 AWG shielded twisted pair (C.T.P.)

instrumentation cable with stainless steel sheath (Product code E30-0212) in conduit-to-cable tray transition.

8. J/C-No. 14 AWG S.T.P. instrumentation cable with stainless steel sheath (Product Code E30-0212) in cable tray.

9. 2/C-No. 14 AWG S.T.P. instrumentation cable without stainless steel sheath (Product Code E30-0209) in conduit.

e File R10925-1 Page 31 Issued: 4-10-84

.' On February 21, 1984, the full-scale floor assembly containing the nine fire resistant cable configurations was subjected to a 1 h fire er. durance test. The fire endurance test was conducted with the furnace temperatures controlled in accordance with the standard time-temperature curve specified in l ASTM standard E119 (UL 263, NFPA Wo. 251) . During the fire endurance test, each of the fire resistant cables was energized with a steady-state electrical current. Commencing after 47 min of fird exposure, each cable was doenergized for 10 s and an inrush current was appliad to each cable and held for 30 s.

After the 30 s inrush, the current levels were reduced to the steady-state values.

Immediately following the 1 h fire endurance test, the fire resistant cables were doenergized, the test assembly was removed from the furnace and the underside of the test assembly was subjected to the impact, erosion and cooling effect of a water hose stream applied for a duration of 90 s. Following additional water application to suppress flaming of the fuel loading cables in the cable tray systems, the fire resistant cables were again i

energized with stead'-state electrical currents for an extended cool-down period totaling 93 h.

' During the initial 79 h of the extended cool-down period, inrush current levels were a; plied to the test cables four times.

Following the 79 h extended er $1-down period, the cables remained energized with their steady-state electrical currents for an additional 14 h, after which they were doenergized and subjected to a second water hose stream test. Following the second water hose stream test, the cables were reenergized and a final inrush I

current test was conducted.

The electrical current measurements recorded A ring the full-scale test investigation are contained in Appeindix A.

The insulation resistance of each fire resistant cable

! conductor was measured before the fire test, 24 h after the fire test and approximately 96 h after the fire test immediately following the second water hose stream. The insulation resistance measurements are contained in Appendix 3 on March 9, 1994 (17 days after the full-scale fire test),

test potentials were applied to each fire resistant cable to determine " trip' voltage and voltage withstand between each conductor and all other conductors plus the shield, sheath or ground. The ' trip

• voltage and sustained voltage measurements are contained in Appendix C.

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, . _ , ,, _ , ,x- - - - , ~ ~ - - - - --*-~-r ~"~-C~ - " ' ' ' ~ ~ ~ ~ " - ~ ' ' " ' ' ~

File R10925-1 Page 32 Issued: 4-10-84 -

As evidenced frca the tables in Appendices A, B and C, each of the nine fire resistant cable configurations in the full-scale test assembly remained electrically functional during the fire endurance test and during the extended cool-down period.

l During the fire endurance test of the full-scale test 4

assnably, all of the light smitting diodes (LED's) in the electrical fault monitoring panel illu 'nated. Based upon an analysis of the electrical fault monit ting :ircuitry and a review of the recorded data, it was determined that no electrical faults occurred in the nine fire resistant cable configurations and that the illumination of the LED's during the fire endurance test was an indication of leakage current caused by the tamperature effect on insulation resistance. To determine the levels of leakage current present in the fire resistant cables during fire exposure conditions, a second fire endurance test was k

conducted on nominal 20 ft lengths of the stainless steel sheathed 3/C-No. 14 AWG power cable (Product Code E30-0211) and the stainless steel sheathed 2/C-No. 14 AWG shielded twisted pair (S.T.P.) instruar.ntation cable (Product Code E30-0212) installed beneat,h a small-scale floor assambly.

on March 9, 1984, the small-scale floor assemb)y was subjected to a 70 min fire exposure with the furnace temperatures controlled in accordance with the ASTM Standard E119 (UL 263, NFPA No. 251). During the fire endurance test, the cables were connected to a three phase power supply adjusted to provide three phase Y voltages of 480/277 Y and 960/555 V ac. The leakage currant measurements recorded during the small-scale test investigation are contained in Test Record No. 2. The tamperatures measured on the stainless steel sheath of each fire resistant cable during the small-scale test investigation are contained in Appendix D.

The calibration records of the instrumentation used in the investigation are contained in Appendix E .

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File R10925-1 Page 33 Issued: 4-10-84 Report by: Reviewed by:

C. . Jcems0N

.%.s ffh R. M. BERMINIG Engineering Associate Engineering Grou Idader Fire Protection Department Fire Protection Department

' , W

' K. W. HOWELL Associate Managing Engineer Fire Protection Department i

-M /

'J. R. BEYREIS Managing Engineer Fire Protection Department CJJ/RMBapr RPT83 n

9 I

4

,. , . - _ , . . y . . _ . . . ~ _ . , ,,.. _

i File R10925-1 Page Al Issued: 4-10-84

$2233213 h Ik!SI!ISAL S2331EI gg3sg31gIEIs IEkk-sg333 23s; 3ss33apy The electrical current in each cable circuit was measured using a General Electric Model 750X93G metering transformer in conjunction with a General Electric Model 25034 panel anneter having a range of 0-5 A ac. The stepdown ratios of the metering transfoneers were calibrated to obtain the required current (s) as a percentage of full scale deflection of the panel assneters.

The three panel asuneters associated with each three-conductor power cable and the two panel ammsters associated with the two-conductor shielded twisted pair (S T.P. )

1.nstrumentation cables were arranged in vertical rows, as shewn in ILL. 16. It was expected that some variation in the current readings would be present in the individual panel ammaters associated with each cable dte to the amall variations in circuit impedance inherent in applications of three phase loads.

Accordingly, the center panel nasneter associated with the white conductor of the individual three-conductor power cables was chosen to represent tha desa. red current in each power cable.

The metering transformer and panel a.nmeter associated with the white conductor (center panel ammeter) of each three-conductor power cable and with each group of conductors of the two-conductor 5.T.P. cables were calibrated against a reference assenter. The refer =nce ammeter used to check the calibration of the metering transformers and panel ammatars was an Amprobe Model ACD-1 hand-held clamp-on digital amnester supplied by The Rockbestos Ccapany. The calibration of the digital ammeter was checked against a calibrated General Electric 0-800A, 0-750 V hand-held clamp-ca ammeter, The actual electrical current associated with the panel amateter reading of each circuit at the desired teet current (s) is shown in the following table:

')

e

. - - - - . _ - . . - . ~ . , , . - , , , , . - _ . , . . . . - . , , , - . ,,, -

File R10925-1 Page A2 Issued: 4-10-84 CURRENT Mr.ASUREMr.NT CALIBRATION

$teedr*$ tate Current f arvsh Ccreeat Meter Attual Meter Actual j Fire Rest etent Ca41e fyse Casle location Reedine. A Geront. A Ase(ine, A Cerrone. A 3/C.No.14 AmC e/$taf aless Conduft te-Ca6le 0.8 4.7 4 19.9 Steel thestn (D0-0211) frey frensttion 3/C+#e.14 AkC e/ Stainless Ca',ie frey te-Caste 0.8 4.1 4 19.4 Steel theath (00-0211) fray fransitten 3/C ees. 14 AmC e/o Stain. Nee. 3 in. Ofemeter 0.3 3.8 4.2 10.1 less Steel Sheath (DO-0204) Coett System 3/C+4e. 6 AE e/ Stainless Cetusutt to C461e 1.0 30.0 4.0 til

$ teel Sheath (D0-0210) fray frensitten 3/C Me. 6 AC e/Stataloss Cable fray to+ Cable 1.0 30.3 4.0 116 Steel Sheath (D0 4210) fray Transitten l

3/C+1ee. 6 AC s/s Stainless hem. 3 In. Otameter 1.0 29.1 4.0 120 l Esee1 Sheath (00-0204) Conduit $yates i

2/C tes. 16 A C 3.f.P. All (4 ISite Cndrs) 3.3 6.7 N.A. N. s.

m/ & e/o Stdniess Steel All (4 516ck Cadre)

$ heath (D0-0212 4 -0209) 4.0 7.7 N.A. M.A.

The steady-state electrical current in each cable circuit and the inrush electrical current in each power cable circuit l

were recorded at various times during the fire endursace test and during tables. theInextended cool-down period, as shown in the following each table, the test time (Hr: Min) is tha elapsed time from initiation <>f the fire endurance test.

During the fire endurance test and, in some instances, during the extended cool-down period, the voltage output from the variable transformers to their associated driver transformers was not leakagesufficient currents. to attain the desired inn sh currents due to In cases where the dcired inrush current was not attainable, the maximus attainable inrush current was. applied and held for a duration of 30 to 32 s rather than the prescribed 15 s duration.

/

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- , -. - ~ . . , .- - - . - ,

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File R10925-1 Page A3 Issued: 4-10-84  :

I ELECTRICAL CURRE4T MEASUREJGNT5 Cele free 3/C ses.14 AmC Meer satte e/statatoes steel sheeth (Preevet Code DC-0211)

Cele Lacetten

• Condult*te-tele tray transitten.

7est God Ctadweter ef te Candvetse Black Consheeter latwah flee, Meter Actual ite pr Actuel fester Actual Curtset Wilsta headtne. A Current. A needine. A Current. A heedf ae. A Cwerent. A g 0:00 0.9 5.3 0.8 4.7 1.0 S.9 -

0 18 0.8 4.7 0.8 3.3 0.8 4.7

• 0:32 0.8 4.7 0.7 4.1 0.9 $.3

• 0:43 0.9 $.3 0.9 3.3 0.9 S.3 0:47 3.4 16.9 3.2 13.9 3.3 16.4 Ms 0:58 1.0 S.9 0.9 3.3 0.8 4.7 +

1:44 0.8 4.7 0.7 4.1 0.9 3.3

• 2:20 4.0 19.9 4.0 19.9 4.0 19.9 17 s 27:34 1.0 S.9 0.9 5.3 1.0 S.9 -

27:39 4.2 20.9 4.1 20.6 4.1 20.4 to a 48:40 0.9 S.3 0.8 4.7 1.0 3.9

• 49:10 4.1 20.4 4.0 19.9 4.0 19.9 15 s 74 00 0.9 5.3 0.8 4.7 1.0 5.9

• 79:30 4.1 20.6 4.0 19.9 4.0 39.9 16 s M 05 4.1 20.4 4.0 19.9 4.0 19.9 15 s Cete free 3/C.les.14 AuC peer cette e/stataloss stael sheeth (Product Code D0-@211)

Cele Lacatten

• Cele troy-te-cable trey transitten.

7est Red Condwetar mite Candvetse Bleek CeaJuster larw6h fles, flater - Actual fester Actuel iteter Aetual Currest ler alst a Asedine. A Current. A heedthe. A Current. A Readine. A Current. A g e,n 0:00 0.4 4.1 0.8 4.1 0.8 4.1

• 0:18 0.8 4.1 1.8 4.1 0.8 4.1

• 4.1 -

4:32 0.8 4.1 0.8 4.1 0.8 4:43 0.8 4.1 0.8 4.1 0.0 4.1 0:47 3.4 17.5 3.7 17.9 3.6 17.5 30 s 9:$4 0.9 4.4 0.9 4.6 0.9 4.6 -

1:44 0.9 4.6 0.9 4.8 4.9 4.4

• 2:*1 4.0 19.4 4.0 19.4 3.9 18.9 17 s 17:34 0.9 4.6 0.9 4.6 0.9 4. *e 17:39 4.0 19.4 4.0 19.4 3.9 18.9 15 s testo 0.8 4.1 0.8 4.1 0.8 4.1 *

/ 49:10 4.0 19.4 4.0 19.4 3.9 18.9 15 6 76 00 0.9 4.4 0.8 4.1 0.8 4.1 79:30 4.0 ' ). 4 s.1 19.9 4.0 19.4 21 a Mies 4.0 $4- 4.0 19.4 3.9 18.9 to a a , ,. . . . - .

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File R10925-1 Page A4 Issued: 4-10-84

,geg)g.,7,23 3/C me.16 AuC powr cable =h statnisse steel thear.h (Product Code C30 01:1)

Chie t.ecatica Isseinst 3 in. diameter et tle steel condef t system.

7eet hed Conductee e t te Cawter eleck Condvetor Inewsh flee, Meter Attual Meter Actual Meter Actuel Castrent NetMin b edine. A Curreat. 4 8eedine. A Cvereat. A needine. A Current. A NPetten 0:00 0.8  !.8 0.8 3.8 0.8 3.4 +

0:18 0.7 3.3 0.7 3.3 0.7 3.3 .

Os32 0.8 3.8 0.4 3.8 0.9 6.3 +

0:43 0.8 3.8 0.8 3.8 0.9 6.3 -

067 3.3 't.8 3.5 '5.8 3.6 17.2 30 6 0:34 0.8 S.8 0.8 3.a1 0.9 6.3 +

1:66 0.9 6.3 0.9 6.3 0.9 6.3 -

3:20 6.0 19.1 6.0 19.1 6.' 19.6 20 s 27:36 0.8 3.8 0.8 3.8 0.9 6.3 -

17:39 6.0 19.1 a.0 19.1 6.1 19.6 13 s besto 0.8 38 0.8 3.8 0.9 6.3 <

49:10 6.0 19.1 6.0 18.1 6.1 19.6 IS s 76:03 0.8 3.8 0.8 3.8 0.8 3.8 -

79sM 6.0 19.1 6.0 19.1 4.1 19.6 15 s M s 05 6.0 19.1 6.0 19.1 6.1 19.6 15 .

Cele free

• 3/C+tes. 6 AuC powe cable w/steintess steel sheath (Prodvet Code 130-0210)

Cele L,se et ten a Condult+te ca61e trey trenettien.

7eet Red Condweter teitte Conductor 81eck Conductor inrush floo, Meter Actuel Meter Actual Meter Actuel %rrent ter:#t a toedine, A Curreat. A Ameding. A Curreat. A Apodine. A Current. A getion 0:00 0.0 26.0 0.8 24.0 0.4 24.0 +

0 18 0.8 18.0 0.6 18.0 0.7 21.0

• 0:32 + + =

- (het tecorded) = = a

• 0:43 0.6 26.0 0.8 26.0 0.9 77.0 -

0:47 2.3 73.8 2.6 70.4 2.5 73.8 Ms 0:54 0.8 26.0 0.6 18.0 0.8 26.0

• 1:44 0.9 27.0 0.9 27.0 0.9 27.0

• 2:20 L7 109.1 3.7 109.1 3.7 109.1 17 s

!?s34 0.0 24.0 0.8 36.0 0.8 24.0

• 27:39 3.8 112.1 3.8 112.1 3.8 112.1 31 s 64:40 0.8 26.0 0.7 21.0 0.4 26.0 -

49:10 3.8 112.1 3.8 113.1 3.9 113.1 Ms 76:00 0.8 26.0 0.7 21.0 0.8 24.0

• 79:30 3.5 112.1 3.8 112.1 3.9 115.1 31 s Mitt 3.8 112.1 3.9 113.1 3.9 115.1 Ms

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. - . . == .

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. . . , . . . . ;;:.  : . t. . . .-

C . . t e. . i is t . f ,1 ,

f i c.: , meter tt hetula lhe ed f an. A L 2 0:00 0.8 2*.; *t.;

0:18 0.8 24.2  :.. 11.2 -

032 0.7 21.2 *T . *1.2 0:4* 0.8 24.2 C.7  :'.!

0:47 3.1 tt.9 1.2 *: :

0 $8 0.9 27.1 *i .

144 0.9 27.3 . '.

• 2:20 4.0 11(.: .: ';

. 20 s 17:34 0.9 27.: .C 't.  ;*.!

• 27:39 6.0 11 ( . '. *.0 tit.: 6.0 15 s 44:60 0.8 24.: *7 . 21.2 *:

. 24.2 -

49:10 4.0 116.: 4.0 116.0 a.C 115.0 15 s 76s00 0.8 24.2 0.7 21.2 0.7 21.2 -

79:30 4.0 116.0 4.0 116.0 4.0 116.0 15 t M 0$ 4.0 116.0 4.0 116.0 4.0 116.0 13 Celeh

• 3/C No. 6 AUC poner cable e/o sta(nless steel theath (Product Code E30-0204)

Cable, Laestina

• hostnal 3 in, stameter rigid steel concult system.

Test Red Condweter uhtte Conductor 81eek toweter inrvSn time. Meter Actual Meter Actual Meter Actual Current HeiMia ne edi ne. A Curreet. A fleasino. A Current. A Asestne, A t.reeet. A N ration 0:00 0.8 23.4 0.4 23.4 0.8 23.4

• 0:18 0.4 23.4 0.8 23.4 0.8 23.4

• 23.4

• 0:32 0.8 23.6 0.8 23.4 0.8 0.7 20.6

• 0:47 0.7 20.6 0.7 20.4 0:47 2.9 87.0 2.9 87.0 2.9 87.0 30 s essa 0.9 24.2 0.9 26.2 0.9 25.2

• 1:44 0.8 23.4 0.8 D.4 0.6 23.4

• 7:20 3.1 93.0 3.1 93.0 3.1 93.0 30 s

' 27:34 0.8 23.6 0.8 23.6 0.8 23.4

• 27:39 3.2 M. 0 3.2 M.0 3.2 M.0 31 a 44:40 0.7 20.4 0.7 20.6 0.7 2 0, *.

49:10 3.2 M.0 3.2 M.0 3.2 M.0 Me 76:00 0.7 20.4 0.7 20.4 0.7 20.6 d 79:30 3.2 M.0 3.2 M. 0 3.2 M0 31 s

- M:05 3.2 M.0 3.2 M.0 3.3 99.0 32 s

Issued: 4-10-84 File R10325-1 Page #1 ,

Cable Types - 2/C-!!o.14 AWG shieldad twisted pair (S.T.P.)

instrumentation cables with and without stainless steel sheath (Product Codes E30-0212 and -0209, respectively) .

Cable Locations - All.

Test White Conductors (4) Black Conductors (4)

Time, Meter Actual Meter Actual Hr t Min Reading , A Current, A Reading, A Current, A 0:00 4.1 7.8 4.1 7.3 0:18 4.3 8.2 4.3 8.3 0:32 4.2 8.0 4.1 7.9 0:43 4.0 7.7 4.0 7.7 0:58 4.0 . . 7 4.0 7.7 1:44 4.0 7.7 4.0 7.7 27:34 4.0 7.7 4.0 7.7 48:40 4.1 7.8 4.1 7.9 76:00 4.1 7.8 4.1 7.9 e

f Page 31 Issued: 4-10-84 File R10925-1

$2153213 I I!! E k AII S E !!!!!I A E S ! M 1412 3 4 H I E I! '

IEkk-1EAh! I!!I A1115!kI The insulation resirtance (I.R.) of each power cable and conductor (one conductor to all others plus sheath / ground) each shielded twisted pair (5.T.7.) instrumentation cable (conductor to conductor plus shield and shield to sheath / ground) were measured using a General Radio Model 1864 Megehmaatar and a 51.egpoon Model 260 Volt-cha-Millitamater supplied by The Rocxbestos company.

The initial I.R. test was conducted approximately 16 h before the fire endurance test with the jumpers disconnected.

The interim I.R. test was conducted approximately 24 h after completion of the fire endurance test with the jumpers in place and with the cables energized with their steady-state proximately electrical 96 h currents. The final I.R. test was conducted ap:

after completion of the fire endurance tast with the jumpers disconnected.

The results of the I.R. tests are shown in the following table:

INSULAflood sDISTANc! iCAsstperTS Cetle Catle laitt al 1.R. ,thee+ laterts 1. A. ,0 hse + Final 1.R. .thn4+

Caer. (100cNee-1 Mn) (50 Wee 1 win) __ (1000Vde 1 Nf a) -

Ce6te Trev t.ecet t en 1600 26C IM Condult-fe* Ace 3/C sts. 14 AuC 6C 4.54 Cable fray mite 160C w/Stals. Steel 160 6.8C teath (D0-0211) T,ransi tien B16ek 160C 12C 12C Cetle Trey- Red 90C 3/C+1te. It ANC 3.8C 7.6C m/Stals. Steel Te-Cable Trey mite 160C 8.6C Block 150C t.6C Sheath (DO-0211) Yranetties 120C 180C pas. 3 in. sed 200C 1/C Ito. 14 AuG 110C 200C Di an.ceneut t 21to 200C s/e Stels. Steel 130C 160C Deem (D0 4204) System Bleek ISOC 7.2C 40C C e tt Tea hed 170C l 3/C-ee. 6 AuG 4.8C SON Cette fray mite 1000 i m/Stals. Steel FC 6.6C Black 130C Sheeth (004210) franittten

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Page 32 Is d @H rile R10925-1 1.2., Wine

• lateria t.R.. Des + Fin 61 1.R.,0hsee Cette Cette initf41 cadr. (1000Vec=1 win) _ (500 Vee 1 min) _ (1000vde.1 min) _

Cette 'rer t.ee sti on Sec 120C Cette fraya Red 130C 3/C+1eo. 6 AMC DOC 544 m/Stals. Steel fe Caste frey alte 130C 82C 66C St ock 1100 theeth ( D0-02101 frenst tt en 170C th nom. 3 In. Red 20cc 1600 V C+1eo. 6 Asc 1500 1300 m/e Stata. Steel Ofes.Co w It mito 170C 1600 Sleet 160C Sheeta ( D 0-0204) Systes 4SC S2C SSC Conduft'Te* *f te S0C 2/C-ano.14 AuG 65C 500 8.f.P. e/ Stats. Cette frey 81eck 180k+++ 150k Shield 26C++

Steel theath fransttfon (0 0-0212) 50pl 60C Cetie fray- mite 600 2/C lee.14 ANC 22C 2008t fe+Cetle frey 8tock 64C S.T.P. m/Stni s. $4k+++ 2tMt Shiels 4SC++

Steel Sheath fransitten (D0-0212) 110C 95C mite 64C 2/C No. 14 Auc Nos. 3 In. 1100 100C 44C 5.f.P.s/a Stals. Ofen. Candelt Stock 1. 2M+++ SM Shiels 110C++

Steel Sheath Systee (00-0200)

• C = C1pashren (1 a Ig' ohne) si a Mo0ehas (1 a 103 ehee }

k a Kilehne (1 a 10 ehme)

• hield to aheath/ ground at 50Vec 1 Mn. ,

All ether me86erements

• • +* Measurements sede etth Slapsen Model 260 Volt *Ow-Mf1]f emmeter.

mode with General Redte Model 1864 Mopetuameter.

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Page C1 Issued: 4-10-84

'/ile R10925-1 bllIME13 S 21!13 SI!IS 12 kI A E1 ElI!!I A E E I!!Il I2kk-1Shh! I!!I b!!!!!LI .

On March 9, 1984 (17 days after fire endurance test of full-scale test assembly), test potentials were applied to each fire resistant cable to determine ' trip

• voltage and voltage withstand between each conductor and all other conductors plus the shield, sheath or ground. The test potentials were applied and measured using an Associated Research, Inc. AC Nypot Junior Model 4025 veh: age source.

The AC Hypot Junior Model 4025 is a nondestructive tester featuring a high reactance type transformer designed so that the output voltage will collapse should the current output excaed a given value. The instrument used for the dielectric voltage-withstand tests described herein war configured to " trip

• at a current output (leakage current, charging current, corona and/or break-down current) of 1r.A.

The results of the dielectric voltage-withstand tests are shown in the following table.

OtCLICTRic YCLTAct vlTH$1Aac anamnesqNTS .

C4ble "frip" fue Minute Cable Cable Trey tesati on_ Cendr. Vet tese, kyse lusteined Voltese hvec 1.s 1.5 3/C tes. In Auc e/ Co e tt Te med 2.6 2.0 Steintest Steel Cette fray White Siect 2.2 2.0 theeth (C0-0211) TrensItien 2.2 2.0 1/C-tee.14 Auc e/ Cette Trey-fe- med efto 21 2.0 Staiatosa Steel Cable frey 81ock 2.2 2.0 Sheeth ( D 0-0211) Trena1tien 1.7

• 1.5 1/C tes. 14 Asc m/s less. 3 in. Red thIto I.7 1.5 Sta1alota Steel Dtes. Co e tt steek 1,53 1.5 theath (s30-4260) Systes And 1.5 1.6 3/C tes. 4 AuC e/ Cenew(t fe.

White 1.5 1.6 Steinleen Steel Cable Trey '

Black 1.3 1.4 Sh*ath (DO-9210) froasttlen

)

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..m, . . . , _ _ . m- _ ,._. . . , , . _ . . _ . _ _ . . _ . . . - , , _

-1 File R10925-1 Page C2 Issued: 4-10-84 Caele ces1e afrts a f.e etavt.

Cener, vette.e. nyee s,.telnov vettee,, 6 vee Cette tre, tuotte.

C# $ frey fe. And 1.3 1.0 3/C+4es. 6 Asc e/ 1.0 Cet fray mite 1.1 Steinleet Steel Tr ansett en Steek t.1 1. 0 Sheath (D0-0210)

And 1.7 1.3 1/C*tse.6 ANC m/e seen. 3 in.

Dios. Ceneult et te 1.7 1.3 Steinless Steel 1.3 System sleet 1.s thmeth ( D 0-0204) i.1 2.0 l 3/C Ke.16 Auc 5.f.P. C m it fe- mite i Cable frey Stock 2.2 2.0 m/$teinless Steel theath (00-0212) franettien Cette frey+fe- mite 2.1 2.0 2/C ses.14 AWC 8.f.P. f.8 Cette fray Blect 1.9 e/Steintees Steel Sheeth (00-0212) freasttten mite 2.1 2.0 2/C Ite.16 AuG S.T.P. leem. 3 in.

Oles Cenewit Block 2.2 2.0 w/o Steintees Steel Sheath (00 0200i Syates g

9

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~' ~ *- . . . . _ _ . _ , _

L Page D1 Issued: 4-H-H File R10925-1 -

AZI!!EII E Shake ZE525Eh22EE HEA12hEoEEEs

!!Akk-1Shk! 1521 A111511I LEATIObf CF TRE3tMOC00PLE5_

The temperatures of each coil of fire resistant cable were measured by two inconel-sheathed chronel-alumel thermocouples p.t.as were af fixed The thermocou having a time constant of 0.5 s.to the stainless steel sheath of each cable wit cable straps and were located as shown in ILL. D1.

TEMPERATURES OF THE CABLES:

The temperatures measured by the various thermocouples on the fire resistant cables were measured at 1 min intervals during the fire test. These temperatures are tabulated in ILLS. D2, D3 and D4.

4 9

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1 Page El Issued: 4-10-84 File R10925-1 ,

4 SII53E13 I I!!I52HIEI Shk115AI19E !!S23D1 '

The instruagents used to acnitor environment, input

~

electrical fire resistant characteristics cables during and the test electrical program characteristics were provided of bythe both Underwriters Laboratories Inc. and The hkbestos Company.

1 Each of the instruments supplied by Underwriters Laboratories In::. was calibrated against an instrument having calibrationThe calibration traceable to the National Bureau of Standards.

records of each instrument are on file at Underwriters Laboratories ,Inc. With the exception of the new Amprobe Model ACD-1 digital ammeter, each of the instruments supplied by The Rockbestos company bore a pressure-sensitive adhesive label

' indicating recent calibration. .

INSTRUMENTS SUPPLIED BY UNDERWRITERS LABORATORIES INC. :

The following instruments were used in the test program.

FULL-SCALE TEST ASSEMBLY Furnace Te!=parature Recorder - The tamperature recorder used to measure the turnace tamperatures was Leeds & Northrup, Model G, UL Instrument No. 6F35TR.

Automatic Data Loquer - The digital data flow acquisition through the system LED's used to monitor elapsed time and currori of the electrical f ault monitoring panei was Acurax Corporation, Model Autodata Ten /10, UL Instrument No. 8FI5DAS.

I Aseseter - The hand-held clamp-on ammeter used to check the calibration of the Amprobe Model ACD-1 digital ammeter supplied by The Rockbestos company was Gana:.il Electric Company, 0-800 A, 0-750 V, UL Asset Identification No. 65 289.

i voltage Source - The voltage source used to measure dielectric voltage-withstand was Associated Research, Inc. ,

Model 4025 AC Nypot Junior, UL Instrument No.1TD5EP.

Water Fressure Gauge - The gauge used to measure the water pressure during the two hose stream tests was NTL, Perma-Cal, 0-300 psi, UL Instrument No. 83FA.

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__ ______ _ _ . - . _ _ _ _ _ __._-____..,--..-_.._m . ,_ _ . - .

- - - . - . . . . , , , _ , . _ . , _ , . _ _ , . _ , . - . _ . _ , . . - , ,,,,rm _-_m

. i File R10925-1 Page E2 Issued: 4-10-84  ;

i SMALL-SCALE TEST ASSEMBLY Furnace Temperature Recorder - The temperature recorder used  !

to measure the furnace temperature was Moneywell Brown Electronik, Model 152715-PSN-296-III-55, UL Instrument No. 11FBSTR.

.i

- Cable Tamperature Recorder - The digital data acquisition i system used to asasure cable temperatures was Leeds & Northrup, ,

Model Trendscan 1000, UL Instrument No. 2F35DAs.

INSTRUMENTS SUPPLIED BY THE ROCK 3ESTOS CONFANY:

The following instruments were used in the test' program.

FULL-SCALE TEST ASSEMBLY ,

Digital Ammeter - The reference asseter used to chack the calibration of the metering transformers and panel asseters was an Asprobe Model ACD-1 (Serial No. 833852) hand-held clamp-on digital ammeter. The digital ammeter was new and did not bear a calibration sticker.

Nequering Equipment - The equipment used to measure insulation resistance was a General Radio Model 1864 Megohmaster .

bearing a calibration sticker reading "I.M. Set, Serial Wo. 2311, Chouked 4-20-83 by Electrical Calibration Laboratory' and a Simpson 260 Volt-Cha-Mil 11 ammeter bearing a calibration sticker '

reading 'I.R. Set, Serial Wo. 712397, Checked 4-18-83 by Electrhcal Calibration Laboratory. "

SMALL-SCALE TEST ASSEMBLY Dioital Multimeters - The four digital multimeters used to measure voltage and current were Beckman 3010 Digital Multiasters. Ead:h digital multimeter (Units DMM-31027035,

-31027364, -31027435 and -31027447) bore a calibration sticker reading ' (Unit Number) , Calibrated 3-7-84 by Robt. A. Gehm, New Equipment-Factory Calibrated-Checked AC Amp Ranges."

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THE K0CI'.BESTO L C O. u t v. OF FILE 4 R10925

. CEROC); W1RELC ABLE OROUP INC% PROJECT # G4NF; I 3-9-84 SMALL-SCALE FIRE ENDURANCE TEST (ERMOCOUPLE lO'S) 1 2 3 4 PtE

!!N'S) 1 841.6 465.7 738.3 1105.2 2 846.3 463.8 781.2 960.5 3 782.1 407.5 748.0 873.0 4 802.0 422.5 757.0 906.7 5 1049.7 644.0 944.7 1277.0 6 1095.2 725.5 101,.2 1273.5 7 1061.4 707.8 1005.4 1226.2 8 1146.7 803.4 1065.3 1316.2 9 1170.9 $49.2 1102.2 1331.2 10 1180.0 882.3 1124.6 1366.9 11 1192.6 919.7 1138.5 1376.0 12 1216.1 953.6 1161.6 1412.3 13 1233.9 996.6 1177.5 1432.1 14 1262.3 1036.5 1204.0 1455.9 15 12S5.3 1062.6 1217.7 1461.7 16 1302.5 1093.1 1234.4 1474.1 17 130%.7 1108.7 1246.8 1481.0 18 1317.0 1131.9 1257.6 1486.2 19 1319.4 1145.2 1257.9 1493.9 20 1328.6 1165.2 1272.8 1505.9 21 1350.9 1196.1 1265.6 1525.6 22 1370.8 1209.0 1312.5 1530.5 23 1031.6 1226.1 1314.3 1534.5 24 1381.3 1237.1 1314.9 1530.3 25 1390.2 1254.7 1332.5 1543.1 26 1403.1 1276.4 1345.0 1556.G 27 1417.2 ,

1293.3 1352.6 1557.4 28 1425.9 1305.4 1360.8 1564.2 29 1444.0 1321.1 1374.6 1572.5 30 1456.4 1338.2 1391.2 '584.4 31 1473.2 1353.6 1406.9 1594.4 32 1488.,1 1367.1 1418.6 1595.4 1

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THE ROCKBESTOS Co. DIV. OF FILEW R10925 CEROCK WIRESCABLE GROUP INC. FROJECTW S4NK.T..

3-9-84 SMALL-SCALE FIRE ENDURANCE TEST THERNOCOUPLE (NO'S) 1 2 3 4 TIME (MIN'S) 33 493.0 1376.6 1429.9 1606.2 34 1438.0 1384.4 1428.5 1606.5 35 1495.4 1396.3 1441.5 1615.2 36 1520.5 1406.7 1454.3 -

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THE ROCMBESTOS CO. TalV. OF FILEk R10926 CERDCK WIRELCADLE CROUP INC. PROJECT # C4Ni!.*. .

3-9-84 SMALL-SCALE FIEE ENDURAt4CE TEST THERMOCOUPLE (N0'S) 1 2 3 4 TIME (MIN'S) 65 1646.2 1611.6 1579.3 1749.7 66 1645.0 1612.5 1578.5 1748.2 67 1649.0 1617.2 1581.8 1751.7 64 1659.3 1626.3 1594.0 1760.0 69 '1673.4 1630.6 1609.3 1763.2 70 1671.9 1634.8 1605.1 1768.4 t

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A" TACH E T 4 CABLE VAULT ELEV ATION 262'-6" THREADED OVERHEAD CONOUITS UNISTRUT SUPPORTS RODS [(TYPICAL)

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Attachment 2 Letter from Robert Konick, Rockbestos Cable Corporation to Marcia Thompson dated March 3,1997.

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• SURPRENANT w *~ "02 DCABLE CORPORATION E.vameent: ws.rt suo c<ur Esst anvey. cr ce:261Ic2 usa re. asusuyco ros: esususor March 3,1997 MarciaThompson Sr. Electrical Engmeer Northem States Power Company 414 Nicollet Mall Minneapolis, MN 55401 Fax:(612)330 7626 Phone:(612) 388.ll21 ext. 4351

Dear Ms.Dompson:

De following is the respome to your Februs.y 25,1997 letter:

1. The 3/C 14 AWG envelopes the 7/C 121WG because they use 6e same materials, tickness, etc. He 7/C 12 AWG has more conductor (non-combustible mass) which may act as a heat sink, and a larger radiating surface, bo6 of which are conservative compned tc te cables tested.

2. He stainless steel armor is a moisture barrier for after the postulated Ere, so it is important that this dom not corrode. He stainless steel is non-rnagnetic and corrosion- resistant. I know of no special requirements for this, but you should foLow 3wr standard procedures.

I do not know of any problems the duet tape can cause.

3. If routed in its own conduit, the armor is not required See RSS 5-144 for ampacities,

4. See attached list of plaats that have used Firezone R.

5. Rockbese da not recommend a particular connector, but a MC connector should be used which is recommended by your cconector manufacturer for use with a etunnuously corrugated stainless steelarmor.

If you need any additional informanen, plense let me know.

Sincerely, O Z -- L ~ - -

r. 6 M ApplicaricrwDesign Engmeer em Mark Valaitis JohnTschummi Tom Jandro E002297 U2 s a n.

A meste et h unman Cmp of coryanws IO*d- EUD8-ES9-098-I sogseqqoou VII:II Z6-90-JWW

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SURPRENANT Rcseisconroesrion

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• rat eso<sss-e3or FIREZONE R CABLE CUSTOMER USER LIST AMERICAN ELECTRIC POWER (AEP) GENERAL PUBUC UTILS. (CPGC) 7,

.DC Cook Nuclear Parsippany, NJ Bridgman, MI Mr. Irving Feinberg ARKANSAS POWER & UGHT '

HOUSTON POWER & LIGHT -

Russellville, AR Houston, TX Nuclear 1 Bechtel Energy Corp.

R.W.E. Bailey CAROLINA POWER & UGHT NORTHEAST UTILITIES Hartsville, SC P. O. Box 270 Mr. M.J. Reid Hartford, CT Mr. Don Kordich ' Mr. Bob Rugar Senior Engmeer Mr. T.J. Shirkey CONSUMERS POWER TELG UTILITIES South Haven, MI Olen Rose, TX Palisades Power Plant Comanche Peak FLUOR ENGINEERS VERMONTYANKEE .

for Southern California Edison Vernon, VT San Onofre Plant Irvine, CA Mr. J.C. McAuliffe Ms. Angie B. Rust 3 33 %

D saa A member eiTk Wrmen Group of emnpen DO*d EZPB-ES9-098-I 5045e9MDOM VZI:II Z6-90-JWN