ML20091Q844

Rept on Fire Resistant Cables

ML20091Q844
Person / Time
Site:	Crane
Issue date:	04/10/1984
From:	UNDERWRITERS LABORATORY, INC.
To:
Shared Package
ML20091Q834	List: ML20091Q832 ML20091Q844 ML20091Q847
References
NUDOCS 8406140177
Download: ML20091Q844 (78)

Text

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\\ UNDERWRITERS LABORATORIES INC I

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n.u an independent, not-for-prof t organization testingfor public safetsj File R10925-1 Project 84NK2320 t

April 10, 1984 REPORT l

5 on FIRE RESISTANT CABLES The Rockbestos Company, Division of CEROCK Wire & Cable Group, Inc.

New Haven, Connecticut Copyright 1984 _ Underwriters Laboratories Inc.

Underwriters Laboratories Inc. authorizes the above named company to reproduce 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 anylimited including, but not obligation or liability for damages, to, consequential damages, arising out of or in connection with the use, or inability to use, the information contained in this Report.

Information conveyed by'this Report applies only to the specimens Underwriters Laboratories Inc.

actually involved in these tests.

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

in no way implies Listing, The issuance of this Report Classification or other Recognition by Underwriters Laboratories Inc. and does not authorize the use of UL Listing or Classification Markings or any other reference to Underwriters Laborarories Inc. on or in connection with the product or system.

e406140177 840609 PDR ADOCK 05000289 PDR p

Look For The @ bsang or.Classificsson Mark On The Product n ~.amn c~,ra m m maa a s

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File R10925-1 Page i Issued

4-10-84 bEEEEbEE

' This Report describes a testing program which was undertaken to develop information for the assessment of fire resistant i

-cables in Redundant. Safety Trains as outlined in " Fire Protection (Appendix R to Program For-Operating Nuclear Power Plants"The testing program consisted 10 CFR 50).

small-scale fire test.

These test investigation and an adjunct 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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4-10-84

_T _A _B _L _E

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Abstract................................................

Tab le 10 f Contents....................................... ii 1

General.................................................

De sc r ipt io n............................................

4 4

Materials..........................................

Full-Scale Test Assembly.....................

4 l

Small-Scale Test. Assembly.....................

8 Erection Of Test-Assemblies.......................

8 l

Full-Scale Test Assembly......................

8 L

Small-Scale Test' Assembly.....................

14 L

Test Record No.

1, Full-Scale Test Assembly.............

15 15 Fire Endurance Test................................

15 Sample........................................

Method........................................

15 Results.......................................

17 Character And Distribution Of Fire.......

17 Observations During Test.................

17 Circuit Integrity........................

18 Initial Hose Stream Test...........................

18 18

' Sample........................................

Method........................................

19 19 Results.......................................

Extended Cool-Down Period..........................

19 20 Second Hose Stream Test............................

20 Sample........................................

Method........................................

20 20 Results.......................................

20 Observations After Tests...........................

21 Discussion...................'......................

Test Record No._2,-Small-Scale Test Assembly...........

25 25 Fire Endurance Test................................

25 Sample........................................

25 Method........................................

26 Results.......................................

Character And Distribution Of Fire.......

26 Observations During Test................. 27 27 Temperatures of The Cables...............

27 Leakage Current Measurements.............

-Summary................................................

30

_A _P _P _E _N _D _I _C _E _S Appendix A,- Electrical Circuit Measurements, Full-Scale Test Assembly............................... Al Insulation Resistance Measurements, Appendix B, Full-Scale Test Assembly...............................

B1 Appendix C, Dielectric Voltage-Withstand Tests, 1 Full-Scale Test Assembly............................... Cl 9

~ File R10925-1 Page lii Issued:

4-10-84 Appendix D, Cable Temperature Measurements,Small-Scale Test Assembly..............................

D1 Location Of Thermocouples..........................

D1 Temperatures Of The Cables.........................

D1 L

Instrument Calibration Records..............

El Appendix E, Instruments Supplied By Underwriters Laboratories Inc.................................. El l

- Full-Scale Test ' As sembly...................... El Furnace Temperature Recorder.............

El Automatic Data Logger....................

El Ammeter..................................

El El l

I Voltage Source...........................

El 5

Water Pressure Gauge.....................

Small-Scale Test. Assembly.....................

E2 Furnace Temperature Recorder.............

E2 f'

Cable Temperature Recorder...............

E2 Instruments Supplied By The Rockbestos Co.......... E3 Full-Scale Test Assembly......................

E3 Digital Ammeter..........................

E3 E3 Meggering Equipment......................

Small-Scale Test Assembly.....................

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Digital Multimeters......................

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4-10-84 L

EEEEEAh The Esubject of this Report is the fire test investigation of fire resistant electrical cables installed.in cable trays,

.The purpose of conduits:and air drops bernath a floor assembly.

the: investigation was to develop 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 We understand that the Power Plants" (Appendix R to 10 CFR 50).

information developed in this investigation is to be submitted p

(NRC),

only to the United States Nuclear Regulatory Commission American Nuclear Insurers (ANI), Nuclear Mutual Limited (NML) and s

. firms concerned with utility installations for their consideration as to the use of the Rockbestos cables in redundant safety trains as specified in Appendix R to 10 CFR 50 for use in Lnuclear generating stations under the jurisdiction of the United l

-States Nuclear Regulatory Commission.

The test program consisted of constructing a floor assembly with.various. cable tray and conduit systems containing fire In. addition, nonfire resistant cables were.

resistant cables.

installed in the-cable tray systems to simulate the fuel loading L

The flocr which would be present in actual site installations.

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assembly was subjected to fire exposure.with the furnace

. temperatures controlled in accordance with the.standardtime l.

(UL 263, NFPA.

Building Construction and Materials, ASTM.E119 the assembly was No. 251). ; Following the fire exposure,

-subjected to'the impact,' erosion and~ cooling effect of a water L

After an extended cool-down period, the p

hose stream test.

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assembly was subjected to a second water hose stream test.

the ' fire I

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

the fire. exposure except for a 10 s period immediately preceding Following an inrush carrent test on each fire resistant cable.

l the cables were-deenergized for the the fire' endurance test, Following the water hose stream test, water hose strcam test.

the cables were again energized with predetermined steady-stata The cables remained energized.throughout

-ac electrical currents.

for 10 s periods a-93 h extended cool-down period except immediately preceding each of four supplemental inrush current the cables Following the 93.h extended cool-down period, tests.

were deenergized for the second water hose stream test.

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

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1 File R10925 Page 2 Issued:

4-10-84 e

.In addition to monitoring ac currents in each of the fire

'[

resistant cables, each conductor of each iire resistant cable was energized with-a dc voltage and monitored for electrical faults.

A total of six fire resistant cable types were tested in a total of twelve configurations.

Nine of the test configurations were included to develop information for consideration as to the 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 Rockbestos Company.

Only the data pertinent to the nine fire resistant cable

. configurations intended for consideration as to use in redundant safety trains, as specified in Appendix R to 10 CFR 50, are

)

included herein.

These nine fire resistant cable configurations l

are listed below:

.rY 1.

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

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

2.

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

-(Product Code E30-0211) in cable tray.

s 3.

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

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~4.

3/C-No. 6 AWG power cable with stainless steel sheath i

(Product Code E30-0210) Ein conduit-to-cable tray transition.

5.

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

t, 6.

3/C-No. 6'AWG pdker cable without st'ainless steel sheath (Product Code :E30-0204) in<cbnduit.-

6' V,

l 7.

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

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instrumentation cable with stainless secel sheath (Product Code E30-0212) in. conduit-to-cable trav transition.

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2/C-No. 14-AWG S.T.P. instrumentation cable with

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ik, stainless ' steel sheath (Product Code E30-0212) in cable-l tray.

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2/C-No. 14 AWG S.T.P. instrumentationcablewithoutcy.[

stainless steel sheath (Product code E30-0209) in conduit; st 3

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l Following! he. full-scale floor fire test investigation, a t

second fire test was conducted on two samples.of the fire

-resistant cables installed beneath a 3 by,3 ft concrete floor each of the During the'small-scale fire endurance test,

' slab.

fire resistant' cables was energized with rated voltage and n monitored to mes,sure leakage current.

.The fire endurance and hose stream tests were supplemented with other tests,and examinations which provided additional

\\ information relative to the electrical performanc'e characteristigs of the fire resistant cables.

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4-10-84 EEESEEZTigg 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 Two of the

' separate 1 steel-reinforced vermiculite concrete slabs.

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.

6 thick.'

" Cable Tray System - The nominal 24 in. wide-open-ladder j.

cable tray. consisted of channel-shaped siderails and The siderails were 6-1/2 in. deep and were boxed-channel rungs.

formed L o f. 0. 0 8 2 in, thick (No. 14 gauge) galvanized steel.

The

.The

topiand bottom flanges of the.siderail were'1-1/4 in wide.

? boxed-channel rungs were 1-1/8 in, wide by 5/8 in. deep and were formed'of 0.066Lin. thick (No.;16~ gauge) galvanized steel.

The-

rungs were spaced 9 in. OC and were welded to the web of the

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siderails-at each1end.- The. loading depth of the tray was-3/4 in...The cable tray straight lengths were manu actured by f

" Metal Products Division, United States Gypsum Company and

. designated "GLOBETR4Y" (Catalog. No. PLHD-SSO9-24 00-6-12).

The-nominal 24 in wide 90* inside vertical riser fittings b

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f Lused in.the cable tray system each had an inside radius o -

-12 in.,J an-outside. radius of 18-1/2 in.,- and a tangent length-of The siderail members for each inside vertical riser were 3 in.

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

The siderail and a Ltop and' bottom flange ' width iof '1/2 in.

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(No. 11 gauge) galvanized

. members were: formed of-0.082 in, thick

The inside vertical-riser fittings were each provided' steel.

lengths.

-with the same boxed-channel ~ rungs used in the straight The rungs were' spaced nominally 6 in. OC and-.were weldad'to'the

~

The inside vertical ~ riser web,offthe'siderails:at each end.

' fittings.were. manufactured by Metal Products. Division,-United-(Catalog States Gypsum Company and designated "GLOBETRAY" f~t No. PLHD-IV90-2412-6)-.

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File R10925 Page 5 Issued:

4-10-84

. The nominal 24 in. wide 90* outside vertical riser fitting used in 'the: cable _ tray system had an inside radius of 12 in., an The outside radius-of 18-1/2 in, and a tangent length of 3 in.

siderail' members were channel-shaped in cross-section with a web F

height of 6-1/2 in. and a-top and bottom flange width of 1/2 in.

- The -siderail members were formed of 0.082 'in. thick

- (No. r 14. gauge). galvanized steel.

The outside vertical riser fitting was provided with the same boxed-channel rungs used in The rungs were spaced the' straight lengths of cable _ tray.

nominally 6'in. OC and were welded.to the web of the siderails at The outside vertical' riser fitting was manufactured by each end.

Metal Products Division,: United ~ States Gypsum Company and designated "GLOBETRAY" (Catalog No. PLHD-OV90-2412-6).

The flat splice plates used to join the inside and outside vertical riser fittings with the cable trny straight sections.

0.107 in. thick (No. 12 gauge) galvanized consisted of 4.by 6 Tr/

steel ~ plates.

Each splice plate was_provided with eight 3/8 in.

long slots which aligned with the four

. diameter by 5/8 in.

3/8 in. diameter holes drilled at each end of the vertical riser The splice plates and streight section1 cable' tray siderails.

were manufactured by Metal-Products Division, United States (Catalog.

' Gypsum Company and designated "GLOBETRAY" No. P-RSPST-6-H).

Each splice. plate was prbvided with 3/8 in.

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

-Steel Conduit Systems - The nominal 3 in. diameter Trade Size rigid steel conduits were 3.500 in.-in diameter.with a wall

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-thickness of 0.216.in. - Each of the three nominal 3 in, diameter rigid conduit systems consisted of two 90' elbows with' threaded ends, cone-nominal 10 ft straight-length with threaded ends, two four threaded lengths each-having'one threaded end,

straight steel couplingsfand.two set-screw fiber bushings.

The nominal 1-1/2 in. diameter Trade Size rigid steel

. conduit u ed in.the' conduit-to-cable tray transition was.

The 11.900 in.-in: diameter with a wall thickness of 0.145 in.

conduit-system consisted.of one 90* elbow with threaded' ends, a straight: length having one threaded end,'two' threaded steel

~ couplings and_ one set screw fiber bushing.

The. nominal 3/4 in.-diameter Trade Size rigid' steel conduits used in the two' conduit-to-cable tray transitions were 1.050 in.

Each of the two in diameter with La wall thickness of 0.113 in.

-conduit f systems consisted of ' one 90* elbow with threaded ends, one straight length having one threaded end, two threaded steel

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couplings and-one set-screw insulated grcunding bushing.

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4-10-84 l

The

.The conduits and elbows each bore the UL Listing Mark.

straight conduit lengths and couplings were supplied by GPU The conduit elbows Nuclear Corporation, Parsippany, New Jersey.

-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 The shell, a brass grommet and a stainless steel coupling nut.

conduit termination fittings were manufactured by Rowe(nominal Industries,' Toledo, Ohio and designated Type 3RT9006 1-1/2 in..' diameter Trade Size fitting) and Type 2RT9006 (nominal t

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 The six cable types were' included in-the fire test assembly.

-were:

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 3/C-No.'6 AWG without stainless steel sheath Code E30-0208);

(Product Code E30-0204) ; and 2/C-No. 14 AWG S.T.P. without.

stainless steel sheath (Product Code E30-0209).

FR SR Class 1E

!The six cable types, designated Firewall Electric. Cables, were manufactured by The Rockbestos Company,

' Division of CEROCK Wire & Cable Group, Inc., New Haven,--

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No marking was present on the cable jackets or t-Connecticut..

L sheaths.

Fuel Lcading Cables - Four types of fuel loading cables were The cable types used were used in the cable tray systems.

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'3/C-No. 2 AWG power cables, C/C-No.'12 AWG control cables, 12'AWG control' 19/C-No.'12 AWG control cables and 37/C-No.

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, cables.

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4-10-84 Each conductor of tho'3/C-No. 2 AWG power cable consisted of seven 0.097 in. diameter copper strands stranded together and covered with a mylar wrap and cross-linked polyethylene (KLPE)

insulation.. The outside. diameter of each conductor was 0.403 in.

The fillers within the cable construction consisted of polyester strands.

The fillers and conductors were encased.in a tissue 4

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 XHHW NEC TYPE TC (UL). " ~

Each. conductor'of the 9/C-No. 12 AWG cable consisted of lseven 0.031-in. diameter copper strands stranded together.and 5

covered with-ethylene propylene rubber insulation and a hypalon The outside diameter of each conductor was 0.196 in.

jacket.

The fillers. within the cable construction consisted of polyester strands...The fillers and conductors were encased in a scrim e

The outside paper wrap and covered.with a hypalon jacket.

diameter of the cable was 0.858 -in.

The cable jacket was marked

" BOSTON INSULATED WIRE AND CABLE COMPANY, (1980) 9/C-12 AWG,

.EPR/HYP INSUL, NYPALON JKT.-600 V."

- Each conductor 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 diameter of each conductor was 0.156 in.. The conductors were encased in a mylar wrap and covered with"a PVC jacket.

The outside diameter of the cable was 0.935 in.

The cable jacket was marked'" ROME CT-B CONTROL CABLE:19/C 12 AWG'CU 600 V.'"

Each conductor of the 37/C-No.:12 AWG cable ~ consisted of seven 04030 in. dimmater copper strands stranded together and-covered with XLPE insulation.

The outside diameter of each~

conductor.was 0.153 in.

The conductors were encased in a mylar-wrap and covered with.a PVC jacket.. The outside diameter of the

. cable'was 1.250Lin.

The cable jacket was marked " ROME CABLE 37/C 12:AWG CU 600 V XLP TYPE-B CONTROL CABLE."

The 19/C-.and 37/C-No. 12 AWG control. cables were purchased locally.

The 3/C-No.11 AWG and the 9/C-No.12 AWG cables were

~

The supplied by GPU' Nuclear' Corporation, Parsippany, New Jersey.

reel: containing.the 3/C-No. 2 AWG -cable bore' a pressure-sensitive Real Number #2,'B/M adhesive label reading "GPU NUCLEAR TMI,

-Footage.896', P.O. Number

, Date Received

~

S.S.N. 118-764-2900-1."

The reel containing ~the' 9 /C-No. 12 AWG cable bore a pressure-sensitive adhesive label reading "GPU' Reel Number. J0018, B /M FR-9JJ, Tootage ' 5 9 3 ', P.O.

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NUCLEAR TMI, Number 891~45, Date Received 9-8-80, S.S.N. 118-753-7000-1."

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4-10-84 Cable Ties - The ties used to secure the fire resistant and 14 SWG (0.080 in.

ffuel loading cables in. place consisted of No.

steel; wire. ties and stainless steel cable straps.

The Ldiameter)

. 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 nominal 36 by 36 by 2 in, thick steel-reinforced normal weight concrete -

slab.=

Fire Resistant Cables -- Two cable types were used in the test _ assembly.

The cable types used 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

. The cable samples were cut from the same reels Code E30-0212).

of. cable used.in the full-scale floor fire test assembly.

' 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:

FULL-SCALE TEST ASSEMBLY

~The fuli-scale floor fire test assembly was constructed in.

-accordance-with the-methods specified by the-submittor, as shown

-in ILLS. l'through 9..The construction'of the test assembly was Lobserved by. members of the technical and engineering staff of

' Underwriters' Laboratories Inc.-

Nominal 6 by.- 6 by 1/2 in. thick structural steel angles were placed along the walls of-the-test frame such thatLthe top of the horizontal: leg was'8 in below'the. top edges of.the' test frame.

'The'five steel-reinforced vermiculite concrete floor slabs were Prior to installation of the

.then installed in the test frame.

floor ' slabs, nominal 1-1/4 in. thick mineral-wool batts were

'placed over theLstructural steel angles to form a, smoke and_ heat.

The average bearing of'each floor slab on the structural seal.

steel angles was 4-1/2 in..

A.6'in. separation we.s maintained ibetween. adjacent floor slabs to accommodate the vertical legs of the cable tray and' conduit / systems.

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4-10-84 17 ft long, were placed over the top I'

. lhe W4x13 steel beams,The beams rested on and were secured to the of the floor slabs.

(bottom chord of projecting. steel reinforcement of each slab inverted Type 8H2 steel joists) to prevent differential deflection of-the various slabs during fire exposure.

The locations of the various cable trays and conduits in the floor. assembly are shown in ILL._1.

The trapezeJsupports 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 l

' auxiliary cable tray.. receiving the tray-to-tray cable air drops t

were. assembled and installed as shown-in ILL.

2.

The 24 in, wide L

main' cable tray system was assembled with flat splice plates in L

conjunction with 3/8 in. diameter truss-head ribbed shank bolts and serrated flanged nuts.

The main' cable tray-system and l

auxiliary cable tray were suspended from the trapeze supports.

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

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to the cable tray siderails.

l The three nominal-3 in. diameter rigid steel conduit systems 4..

The three were assembled.and installed as: shown in-ILL.

conduit systems rested on the trapeze supports and were Jadditionally supported.by means of nominal 2.by -2:by 1/4 in.

thick steel angles,124 in..-long, spanning across the projecting

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

Prior to' installation of the main cable tray systemi auxiliary cable -tray and the three nominal 3 in. diameter rigid j ~.

< steel 1 conduits, a nominal-l'.in. thickness of ceramic-fiber

' blanket was placed~on:the 3 in, wide bearing leg of the trapeze i

rest directly L

support;angleJsuch that the cable raceways did not r,

I upon the steel 1 trapeze supports.

The two nominal-3/4 in. diameter rigid steel conduits and the nominal 1-1/2 in._ rigid steel conduits for'the 5.

conduit-to-cable tray transitions were installed as shown ILL.

The.elboCof each conduit rested on and was welded to the 3 in.

leg of'the~ trapeze support angle.

Each conduit was additionally thick steel supported'by means of nominal 2 by 2 by 1/4 in. spanning across;the p 24.in. long,

Langles, reinforcement of the floor slabs and welded to the conduits.

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n File R10925-1:

Page 10 Issued:

4-10-84 The 6 ft, 9 in. long auxiliary cable tray was provided with Each a 41.5 percent' fill of randomly-laid fuel loading _ cables.

cable was cutsinto a 6 ft,19 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 Material Material Cable OD Quantity cable Type-3/C-No. 2;AWG XLP-HYP 1.036 in.

16 pieces 9/C-No. 1210fG EPR-HYP HYP 0.858 in.

16 pieces 19/C-No. 12 AWG PE PVC 0.935 in.

36 pieces 5

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-S.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 The auxiliary cable tray with stainless steel cable straps.

cable were

-3/C-No. 6 AWG cable and the'2/C-No. 14 AWG S.T.P.

Linstalled such that the stainless steel sheath was in contact with the siderail'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.

AfterLinsta11ation of the stainless steel sheathed cables, a 41.5 ' percent ' fill of randomly-laid fuel: loading ' cables was installed 11n.the~ main cable trayfsystem..The type'and quantity

~ f fuel ~ loading c' ables.in the main cable tray system was o

The-identical ~to:that installed _in the auxiliary. cable tray.

fuel loading cables were ' installed along the entire length of the P

cable l tray _ system beneath~the. floor and terminated approximately L

2'in. below'the underside'of the floor.

The vertical runs - of l:

' cable in.the main. cable tray system were secured to the cable

-trayf rungs with stainless steel cable straps and steel' wire ties.

Each-of-the three fire resistant cables in the main cable Ltray system passed through the floor and projected above the top fof,the floor.

. ~..

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File R10925-1 Page 11 Issued:

4-10-84 Three. fire resistant cables without stainless steel sheaths were installed in each cf the three nominal 3 in. diameter conduit systems, as shown in ILL. 4.

The west conduit system i

contained three 2/C-No. 14 AWG S.T.P. cables (Product Code E30 1209).

The center conduit contained two 3/C-No. 14 AWG cables anc cae 3/C-No. 6 AWG cable (Product Code - E30-0208 and

-0204,-rer, acively).

The east conduit contained two 3/C-No.-61AWG cables and one 3/C-No. 14 AWG cable (Product Code E30-0204 and -0208, respectively).

Each cable was installed along the entire length-of each conduit system and projected approximately. 2 ft.beyond each end of each conduit system.

After installation of the cables, the ends of each conduit on the unexposed side of the assembly were stuffed with pieces of 5

ceramic fiber blanket to minimize convective heat loss and smoke

' issuing from the conduit during the fire test.

i

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---

,n---_

^

r File R10925-1 Page 12 Issued:

4-10-84

, Hone 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 (Product Code E30-0210).

The fire resistant cable cable installed in_the west. nominal 3/4 in. diameter rigid steel conduit'was 6 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. 714 AWG S.T.P. stainless steel sheathed cable. (Product Code E30-0212). 1The portion of each fire resistant cable which

' entered the rigid steel conduit was stripped of its stainless steel' sheath. _ The ~ stainless steel sheathed portion of 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.

l.- At its entrance into the main cable tray system, each fire resistant cable -was secured ' to the top layer of fuel loading The_ fire resistant

. cables using. stainless steel cable straps.

cables extended through the floor and projected above the top.

surface of theLfloor, with the. ends of the cable secured to.the

< rungs of the main cable tray system with stainless steel, cable The conduit-to-cable tray transitions were accomplished straps.

For'esch using compression-type conduit terminations.

f' transition, the-conduit termination compression shell was threaded into the conduit coupling at the end of the conduit elbow. LThe fire resistant cable, with stainless steel sheath removed and with the conduit termination coupling nut and. grommet in place, was. inserted into the conduit through-'the: opening L

.The cut end of the stainless steel shearn the compression?shell.

into the open end of the

. projected approximately 7/8 in.The small end of the brass grommet was flush compression-shell.

with the end of the stainlaps steel sheath.

While restraining the.ccmpression shell7from' rotating,.the coupling nut was brought forward and tightened onto the compression shell to 150 ft-lb.

l The funsheathed portion of each fire resistant. cable extended approximately 2 ft-beyond the ends of the conduits on the After installation of the fire r

unexposed side of;the assembly.

I resistant cables, the'end of each_ conduit on the unexposed side L

of the assembly was ' stuffed with pieces of ceramic fiber blanket to minimize convective heat loss and smoke issuing from the conduit.during the fire test.

D-

l File-R10925-1E

.Page 13 Issued:

4-10-84 i

l After installation-of the cable trays, conduits and cables, the nominal 6 in, wide slots in the floor assembly containing the vertical legs of the various systems were fi'. led with vermiculite concrete as a firestop.

First, each of the rire' resistant cables

~

(three cable exiting the floor from the main cable tray system ends'atonorth end of assembly and six cable ends at south end of s

assembly) were individually wrapped with a nominal 1 in. thick by The ceramic fiber 4 in. wide' piece of ceramic fiber blanket.

' blanket was. secured in place with steel wire ties and was' installed such that the bottom edge of the ceramic fiber blanket Removeable-wrap was flush with the. bottom surface of the floor.

flush with the underside of

. forms:were placed beneath each slot,

~Small pieces or ceramic fiber blanket were

.the floor slab.

stuffed between the edges of the forms and - the cables _ to minimize 5

Nominal 7'in.. lengths of

' leakage of the vermiculite concrete.

nominal 1/2 in diameter deformed steel rods were wedged'into each slot-to act'as reinforcement.

The vermiculite concrete, composed'of five parts expanded vermiculite aggregate to one part by bulk volume, and mixed with water, was pumped Portland cement, into.-the slots and struck with a trowel.

After drying for 24 h,

~

-the forms were removed from the underside of the assembly.

.As a1 final; step, the underside of the floor assembly and the p

N ihorizontal and. vertical' members of the trapeze supports beneath

'the floor assembly were protected.

The protection on the nominal 1/2 in. diameter threaded steel rods _ acting as the vertical' members of the trapeze supports.were each wrapped with a nominal-

. thickness of ceramic fiber blanket. held in place with steel

'l in.

The ceramic fiber blanket was then wrapped with a wire-ties.

for the

. layer.of. expanded steel lath to act as a mechanical key The protection material applied to the protection material.

expanded steel lath consisted of a nominal 1 in. thickness of Zonolite Type MK-5 cementitious mixture which was mixed with water andfapplied by hand. LThe' protection on the L4x3x1/2 in.

thick structural steel angles forming the horizontal member of the trapeze support consisted of a nominal 1/2 in, thickness of-the Type MK-5 cementitious mixture applied to all exposed faces The protection on the underside of the floor of the s. eel angle.

assembly consisted of a nominal 3/4 to 1 in thickness of spray-applied Type MK-5 cementitious mixture.

i The appearance of the exposed surface before the fire 6, 7 and 8.

The appearance of endurance test is shown in ILLS.

the unexposed surface before the fire endurance test is shown in ILL. 9.

O

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A

-Tile R10925-1, Page 14 Issued:

4-10-84 SMALL-SCALE TFST ASSEMBLY JThe small-scale floor fire. test assembly was constructed in accordance with the methods specified by the submittor, as shown The construction of.the test assembly was observed

'in ILL.-20.-

by members.of J 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

L Code!E30-0211;and -0212, respectively) were each formed into a

. coil having' an outside ~ diameter of approximately 28 in. and Each coil was formed and held 5

7containing:three coils of cable.

in position with1 four: stainless. steel cable ~ straps, as shown in

ILL. 20.

Four' nominal 1 in.. diameter holes were drilled in the L

. nominal /2 in. thick concrete slab to accommodate the four ends of Jthe 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 g

slab and ~ a ik). 8 SWG. (0.162 ~ in. diameter) galvanized steel-wire f

was:thresded through the-holes and;through the two coils of cable 7

with the two ends of the wire twisted together on the top (unexposed) -side of the concrete islab to suspend the ' coiled The four cable ends were additionally supported on the Jtop side of the floor. by means of short ' lengths of steel channel.

cables.-

[

Each of the six hc.es in i

=in. conjunction-with steel wire ties.-

-the concrete slab was stuffed with small pieces of ceramic fiber I

blanket.-

-The end ofteach' cable projected approximately 30 in, above l

the top surface-of1the floor.-

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- File.R10925-1 Page 15 Issued:

4-10-84 TEST RECORD N O.

I rg&&-sgA&E ggs; ass 3MsLX FIRE ENDURANCE TEST:

Thel fire endurance test was conducted with the furnace lled-in accordance with the Standard for Fire temperatures contro (UL 263, Test.. of: Building Construction and Materials, ASTM E119 NFPA. No. - 251). ;

SAMPLE 5

The fire endurance test was conducted'on the full-scale test

assembly constructed as previously described in this Report.under

'the section-entitled " Erection Of Test Assemblies" and as shown

,inLILLS. I through 9.

fire

.TheLinstallation of the cable raceways, conduits, resistant 1 cables and fuel loading cables was completed approximately seven days,before the fire endurance-test was:

conducted.

METHOD for-The. standard _ equipment of Underwriters Laboratories Inc.

j fire endurance test.

testing floor assemblies was used for the

- The temperatures of the furnace chamber were measured ~by from the underside of.

16 thermocouples which were placed 12 in.

10.

the' floor assembly, located as shown in ILL.

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ww--

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.=

File R10925-1 Page 16 Issued

4-10-84 Each conductor of the nine fire resistant cable configuratione 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 0208, -0210 and conductor power cables (Product Code E30-0204,

-0211): was provided with a jumper between its two ends which was fitted with a driver transformer set and a metering transformer, as shown in ILLS.'12 and 13.

The characteristics of the driver l;

transformer circuit and itsl associated variable transformer were such that all conductors of each three conductor cable had a common driver-transformer set controlled by a single variable j

transformer, as shown in ILLS. 15 and 16.

The. control range was 6

l such that currents in the range of 3 to 21 A could be achieved on the 3/C-No. 14 SWG. cables and 20 to 120 A could be achieved on i

the'3/C-No. 6 AWG cables.

The 2/C-No. 14 AWG S.T.P.

L instrumentation cables (Product Code E39-0209 and -0212).were similarly connected. -However, the conductors of all of the two

!~

conductor: cables were driven by a common transformer (three test Esample cables plus one engineering sample cable for a total of-t eight conductors), as shown'in ILLS. 14, 15 and 16.

The predetermined steady-state and inrush current values for l-the.3/C-No. 14 AWG power cables were 3.4A and 21A, respectively.

The predetermined' steady-state and inrush current values.for the I

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

The 2/C-No. 14 AWG S.T.P. instrumentation cables were each energized with a simulated " pilot" current in the approximate

range of 1 to 2 A.

Before the start of the fire endurance. test, each cable was As the fire

' energized at 1ts predetermined steady-state current.

endurance test _ proceeded, the output of the variable transformer was increased to maintain the steady-state currents as compensation for the increase in~ circuit resistance caused by the

. normal resistance versus temperature characteristics of the conductor exposed to'the fire.. During the last 15 min of the' fire portion of the test, each three conductor power cable was deenergized for 10as.

After 10 s,'the current was reapplied and rapidly adjusted to an inrush value.

The inrush current was held for 30. s and.then rapidly decreased to.the predetermined steady-stats >value.

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File'R10925-l' 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 dc. 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 alectrical fault monitor circuitry are shown schematically _in

- ILL. 17.

The electrical fault monitor panel was connected to an l-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. control, the conditions of the exposedLand unexposed surfaces, and all developments pertaining to.the performance of the fire resistant cables with special

. reference to circuit integrity, f.

RESULTS L

Character And' Distribution Of Fire - The. fire was luminous and well-distributed.

As.shown in ILL. 10, the furnace l',

. temperatures followed the standard time-temperature curve as

(' L 263, NFPA No. 251) during outlined in the Standard,. ASTM-E119 U

the:first 10 min of fire exposure.

Thereafter, the heat j

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.

i observations During Test - On the exposed side of the test o

assembly, the fuel loading cables in the auxiliary cable tray ignited at 40 s.

The fuel loading cables in the main cable tray system were smoking at'1' min, 30 s and, at 2 min, 15 s, the L

cables ignited.

By 3 min, 30 s,_the fuel loading cables in the L

main cable tray. 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 20.51n of fire exposure, the cable tray siderails bowed inward and several of the cable tray rungs disengaged from the cable tray'siderails and allowed the fuel ~1oading cables to deflect downward.

On the unexposed side of the test assembly, white smoke l commenced issuing from the ends of the fire resistant cables at 4 min.

The smoking. continued until 30 min.

Thereafter, no t

significant changes occurred on the unexposed side of the test

. assembly.

The furnace fire was extinguished at 60 min.

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. File R10915-1 Page 18 Issued:

4-10-84 each circuit Integrity During the fire exposure test, f each fire resistant cable carried its steady-state 4

conductor o During the fire exposure, it was necessary

-electrical. current.

to'" trim"-the variable transformer to maintain the test current.

47 min,.each three conductor power cable was Commencing at The current was then reapplied to each deenergized for 10 s.

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 The electrical.

e

. current waa reduced-co its steady-state value.

current measurements recorded during the fire endurance test are contained in Appendix A.

(

some of the light emitting During the fire endurance test, in the electrical fault monitor panel commenced-

' diodes L (LED's)

By 25 min, all of

. glowing visibly after 12 min of fire exposure.

.the LED's were illuminated at various degrees of brightness.

i' h

,However,:at that time, no electrical faults were indicated by t e automatic data logger monitoring current flow through the LED's.

~

As the. test; progressed, the brigh:tness of t,he LED's increased and l

the current _ flow through the LED's registered on the-automatic

. data-logger.

the electrical fault Following the fire endurance test, Based on this analysis monitoring circuitry was analyzed.

described in'the section of this Test Record entitled

" Discussion," it was determined that no electrical faults occurred in any of the nine fire reaistant cable configurations Rather, it was determined that

~

during the fire endurance test.

the illumination of ' the LED's during the fire endurance test was an-indication of~ leakage currents caused by the temperature effect on insulation resistance.

INITIAL HOSE STREAM TEST:

SAMPLE The hose stream was applied to the exposed surface of the-The hose stream test commenced approximately floor assembly.

5 min, 30 s after the furnace. fire was extinguished.

L jg METHOD At the conclusion of the fire exposure,.the fire resistant cables were deenergized and the test assembly was lifted from the furnace and. moved to the hose stream area.

I

File R10925-1 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 approximately 17 ft, 3 in..from the center of the test assembly and on a line approximately 27' from a line normal to the center of the assembly.

The water pressure measured at the inlet 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 suppresc flaming of the fuel loading cables in the main cable tray system and in the auxiliary cable tray.

RESULTS Upon suppression of all flan 9ng of the fuel loading cables, 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.,

At the condlusion of the fire endurance test, all of 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 (dim LED) ' was indicated between the shield and sheath of the 2/C-No. 14 AWG S.T.P.

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

cable tray system.

EXTENDED COOL-DOWN PERIOD:

At the conclusion of the fire endurance test and initial the predetermined steady-state electrical water hose stream test, currents were reapplied to each of the nine fire resistant cable The cables remained energized-throughout a 93 h configurations.

extended cool-down period except for 10 s periods immediately The preceding each of four supplemental inrush current tests.

electrical current measurements recorded during the extended

-cool-down period are contained in Appendix A.

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Page 20 Issued:

4-10-84 Film R10925-1 In addition to monitoring current'in each of the nine fire 4

resistantLeable configurations, each fire resistant cable was energized with a dc voltage and monitored for electrical faults To monitor, circuit during the 93 h extended cool-down period.

the integrity in the absence of an operator (at night),

electrical fault monitor panel was connected to an automatic data

~ logger which scanned each circuit at 55 min intervals and No provided a printed record to.show electrical faults. electrical faults SECOND HOSE-STREAM TEST:

5 SAMPLE The hose stream was applied to the exposed surface of the The hose stream test commenced-approximately floor assembly.

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 dc voltage and the cable used to monitor cables for electrical faults) trays, conduits and-cables were subjected to the action of a

~

The hose water-hose stream applied for a duration of 90 s.

(set at a stream was applied with an electrically-safe fog nozzle _ at a max 30' included angle) the cable 1 trays, conduits and cables.

The water pressure

' measured at the -inlet of the 1-1/2 in, diameter hoce 50 ft upstream of the nozzle was 100 psi.

RESULTS no electrical faults occurred Curing the hase stream; test,

~

in the fire resistant cables.

current was applied Upon completion of the hose stream test, Each to each"of the nine fire resistant cable configurations.

conductor-of nach fire resistant cable carried its steady-state A final inrush current' test was conducted electrical current.

approximately 3 min after the hose stream test was comp inrush current test are contained in Appendix A.

OBSERVATIONS AFTER TESTS:

The appearance of the exposed surface of the test assembly after;all testing was completed is shown in ILLS.'18 and 19.

4 e

File'R10925-l~

Page 21 Issued:

4-10-84 4

t the exposed side of the assembly, the three nominal 3 in.

diameterLrigid steel conduit systems and the three conduits used cxt for the conduit-to-cable tray transitions were oxidized but were otherwise= unchanged.

The main cable. tray system and auxiliary cable tray were d

A majority of the_ cable tray rungs were

. essentially destroye.

disengaged from the cable tray siderails at one or both ends _such 1that the mass of fuel loading cables was supported by the trapeze supports and by.the fire resistant _ cables which penetrated the floor assembly:at the two ends of the main cable tray system.

'Approximately 80 percent of the insulation and jacketing,

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

The stainless steel sheathed fire resistant cables in the

-main. cable tray system and in the conduit-to-cable tray transition were displaced due to the disengagement of the cable tray rungs and the ~ resultant downward movement of the fuel With the loss of support from the cable tray loading cable mass.

rungs, the fuel loading cable mass along most of the main cable

. tray system run was suspended from the stainless steel sheathed The stainleas steel sheath on each of the fire resistant cables.

fire resistant cables did not appear.to be damage.d by the applied stresses.

The cementitious mixture protection material on the

- underside of the floor assembly and on the trapeze supports was Beneath the partially dislodged by the water hose stream tests.

protection material, the floor assembly and trapeze supports remained structurally sound.

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

assembly.

N DISCUSSION:

some of the light emitting During the fire endurance test,in the electrical fault monitoring panel commenc

' diodes. (LED's)

By 25 min, all of

. glowing visibly after 12 min of fire exposure.

.the LED's were : illuminated at various degrees of brightness.

However. at that time, no electrical faults were indicated by the automatic' data logger which monitored current flow through the As the test progressed, the brightness of the LED's 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 24 Issued:

4-10-84 i

Because of the scale of the test assembly and safety considerations involved, it was deemed inadvisable to conduct the full-scale fire test investigation with the cables energized at Instead, the cables were energized only at rated rated voltage.

i current with a supplemental low voltage de electrical fault In order to determine the levels of leakage

. monitoring circuit.

current present in the fire resistant cables under fire exposure a second conditions with the cables energized at rated-voltage, fire test investigation was conducted,.s described.in Test a

Record No.

2.

n 4

D a

' File R10925-1 Page 25 Issued:

4-10-84 TEST RECORD N O.

2 S3 App-SCAp3 13SI ASS 33Bpl FIRE ENDURANCE TEST:

The fire endurancs test was conducted with the furnace temperatures controlled in accordance with the Standard for Fire Testi; Of Building Cons,truction And Materials, ASTM E119 (UL 263, NFPA No. 251).

SAMPLE 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. cebles 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 horizontal exposure furnace, as shown in ILL.-21.

.Tha furnace temperatures were measured by three thermocouples' symmetrically, located 12 in below the exposed surface of the floor: slab.

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. Dl.

The fire resistant cables were connected to a test panel 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--V ac.

At room temperature (approximately 70 'F) the circuit was energized and charging currents were measured.

Since only one test panel was available, the 3/C-No. 14 AWG power cable was energized continuously throughout the fire endurance test

. except; for brief periods when it was disconnected to make

measurements on the 2/C-No. 14 AWG S.T.P. instrumentation cable.

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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.

RESULTS Character And Distribution Of Fire - 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 No. 251), and as shown in the following table:

Test Temperature,

'F Average Furnace

Time, (ASTM E119 Time-

-min Temperature Curve)

Temperature,

'F 400 1

285 645 2

500 725 3

670 760

4 '

860 1000 5

1000 1145 6

1110 1180 7

1180 1240 8

1230 1270 9

1260 1300 10 1300 1400 15 1399 1445 20 1462

-1500 25 1510 1550 30 1550 1580 1584 35 1620 1613 40 1640 45 1638 1670 1661 50 1690 1681 55 1700

'1700 60 1710

• 65 1718 1735' 70 1735 1750 75 1750 1760 78 1759 4

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' age 27 Issued:

4-10-84 File R10925-lL P

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 steel

~

' sheaths.

On the unexposed side of.the test assembly, white smoke commenced issuing from the ends of the fire resistant cables at 3 min.

The smoking continued until 30 min.

Other than discoloration of the cable -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 78 min.

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 Appendix D, ILLS. D2, D3.and D4.

Leakage Current Measurements - During the fire endurance test and after.the fire endurance test was completed, the. leakage currents in each fire resistant cable were measured while energized at rated voltage.

The applied *vo,ltages and leakage currents were measured using four-Beckman 3010 Digital Multimeters supplied by The Rockbestos. Company.

After 1 h of fire exposure, each cable was subjected to an overvoltage condition- (960 V ac phase-to-phase) for a minimum of 2 min and supplemental leakage current measurements were obtained.

The leakage current measurements recorded during the fire test investigation are shown in the following tables:

t i

l 9

...m,..w....

....,..,r,,...,,.

File R10925-1 Page 28 Issued:

4-10-84 tKANACE CURRENT MEASURENENTS (Appited voltage - 4a0 V ac 3-Phase Y, 277 V ac - Ground) 3/C - No.14 AWC Power Cable W/ Stainless Steel Sheath (E30-0211)

. Test Time Avg. Furnace, Leakane current. Phase-Cround Leakaee Current. Phase-Delta ei n -

Temo.. *F Red Cnde.

mite Codr.

Black Cndr Red Cnde.

White Code.

Black Cnde.

'O 70 72.6uA 74.9uA 74.9uA 94.6uA 97.4uA 97.7uA 150uA 152uA 158uA 6

1145 12-1345 0.19mA 0.21mA 1.5mA 0.19mA 0.25mA 0.5mA c'

0.34mA 0.35mA 0.45mA 18 -

1430 20.

-14,45 0.43mA 0.45mA 0.46mA 0.44mA 0.45mA 0.47mA f

31 1555 1.0tnA 1.09mA 1.11mA 0.99mA 1.06mA 1.07mA-l

~40 1620 7.16mA 7.45mA 5.49mA 6.91mA 7.13mA 5.30mA l.

47 1660 13.8mA 13.0mA 10.2mA 12.8mA 12.8mA 9.69mA 54 1680 24.2mA 23.7mA 18.3mA 23.9mA 23.4mA 18.OnA 63 1705 42.7mA 42.3mA 32.9mA 42.1mA 41.4mA 32.4mA 97+

650 110uA 114uA 64uA 114uA 125uA 73uA L

2/C - No.14 AWC 5.T.P. Instrumentation Cable W/ Stainless Steel Sheath (E30-0212)

Test Time, Avg. Furnace ' Leaksee Current. Cnde. - Shield Leaksee Current. Cnde. - Cndr.

min

- Tomo..

• F White Conductor Black Conductor White Conductor Black Conductor 0 ~

70 97.6uA 95.1uA 110uA 110uA I

'26 1505 0.96mA 0.84mA 0.92mA 0.83mA 35 1580 4.21mA 3.65mA 4.06mA 3.58mA 49 1670 23.2mA 21.3mA 22.9mA 21.0mA

-65 17101 60.9mA 59.6mA 60.baA 59.imA-

.103+

600 100uA 103uA 112uA 112uA

+ - Furnace fire eatinguished at 78 min. Leakage current measurements taken with. test' sample located In furnace, f

SUPPLDeNTAt. LEAKAGE CURRENT MEASURDENTS j.

- ( Applied Voltage - 960 V ac 3-Phase Y, 555 y ac - Cround)++

3/C - No. 14 AWC Powee Cable W/ Stainless Steel Sheath (E30-0211)

Test Time, Avg. Furnace Leaksee current. Phase-Cround leakaae Current, Phase-oetta min Tomo.

• F Fed Cnde.

White Cnde. Blacs Cnde. Reo Cnde, white Cnde. Slack Cnde.

68 1725-127mA 138mA 99nA 108mA 110mA 84mA 3

.,--f..%

.e,-

.w.,_,,,..

.,,,,,....,m,,.

,.,,_.._m.

.,w__,...mm__,_m,_,,~,,,,_,_m.,__y

.m,_,m,_,~%,.,_...m.,

e i

File R10925-1 Page 29 Issued:

4-10-84 2/C - No.14 AWC 5.T.P. Instrumentation Cable W/ Stainless Steel Sheath (E30-0212)

Test Time, Avg. Furnace Laaksee Current. Cade. - Shield Leaksee Current. Cndr. - Cnde.

ein Temo. 'F mite Conductor Black Conductor mite Conductor Black Conductor

'75 1750 163mA 162mA 130mA 138mA

++ = High voltage applied and held for minimum 2 min for each leakage current measurement.

As a supplement to the above, the leakage current between the shield and the sheath-of the 2/C-No. 14 AWG S.T.P.

. instrumentation cable was measured after approximately 75 min of fire exposure.

With an applied voltage of 10 V ac, the leakage

+

~ current-was 113 mA.

With an applied 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 AWC S.T.P. instrumentation cable was The measured during and aftar the fire endurance test.

insulation resistance measurements recorded during the fire test

. investigation are showri in the following table:

Shield-Sheath Test Time, Average Furnace min Temperature,

• F Insulation Resistance 27 1525 17 kilohms 2.1 kilohms Sti 1695 75 1750 3.5 kilohms 103 600 100 kilohms 6

. w-4-e.

~

,wy w-

File R10925-1 Page 30 Issued:

4-10-84 E E E E b'h1

. In _ consideration of the nature. of this investigation, the foregoing ~ Report is to be construed as information only and should not be regarded as conveying any conclusions or recommendations on the part of Underwriters Laboratories Inc.

regarding the acceptability of the fire resistant cables for use in redundantisafety trains,-as specified in Appendix R to 10 CFR 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 The nine fire resistant cable configurations are assembly.

~ listed.below:

[3/C-No. 14 AWG power cable with stainless steel sheath in conduit-to-cable tray transition.

1.

(Product Code E30-0211) 14 AWG power cable with stainless steel. sheath 2..

3/C-No.

(Product Code E30-0211) in cable. tray.

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

~

6 AWG power cable with stainless steel sheath i

4..

3/C-No.

(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-No. 6 AWG power cable without ~ stainless steel

~

asheath (Product Code E30-0204) in conduit.

12/C-No. 14 AWG shielded twisted pair (S.T.P. )'(Product 7.instrumentation'c:ble with stainless steel sheath Code 1E30-0212) in conduit-to-cable tray transition.

8.

_2/C-No. 14 AWG S.T.P. instrumentation cable with in cable stainless -steel sheath -(Product Code E30-0212) tray.

9.

2/C-No. 14 AWG S.T.P. instrumentation cable without

. stainless steel: sheath (Product Code E30-0209) in conduit.

P e

' File!R10925-1 Page 31 Issued:

4-10-54 on February 21,,1984, the full-scale floor assembly containing'the nine fire resistant cable configurations was The fire endurance. test subjected to a.1 h fire endurance. test.

was conducted with the furnace temperatures controlled in i

'accordance with the standard time-temperature curve specified in ASTM Standard E119 (UL 263, NFPA No. 251).

During the fire endurance test, each of the fire resistant cables was energized Commencing after 47 min i

- with a steady-state electrical current.

of fire-exposure, each cable was,deenergized for 10 s and an l:

inrush current.was applied to eaci cable and held for 30 s.

After the 30 s inrush, the current levals were reduced to the i

l steady-state values.

the fire L

Immediately following the 1 h fire endurance test,

. resistant' cables were deenergized, the test assembly was removed from the furnace and the underside cf the test assembly was n

L subjected to the impact,-erosion,and cooling effect of a waterFollowing additional hose stream applied for a duration of 90 s.

water application to suppress flaming of the fuel loading cables.

in the cable tray systems, the fire resistant cables were again

. energized with steady-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 applied to the test cables four times.

Following the 79 h extended cool-down period, the cables remained energized with their steady-state electrical currents for an additional 14-h, after which they were deenergized and subjected Following theLsecond water =

to a.second water. hose stream test.the cables were reenergized and a final inrush ll' hose stream test, current test was conducted.

I:

The electrical current measurements recorded during the.

full-scale test investigation are contained in Appendix A.

~

ble

.The insulation resistance of each fire resistant ca fire conductor was measured before'the fire test, 24 h after the

-test and approximately 96 h after the fire test.immediately

~

The insulation following the second' water hose stream.

resistance measurements are contained in Appendix B.

On March 9, 1984-(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 l conductors plus the shield, sheath or The " trip" voltage and sustained voltage measurements L

ground.

are contained in Appendix C.

I

-,...,..~v e.

._...,wr..e._,,,.m.w...

.,m.,,

.,.m

-..m..,

-,,-.m.m,.._m_..--.w,.

...m._,

m,

File R10925-1 Page 22 Issued:

4-10-84 Following the fire endurance test and the initial water hose stream test, the only electrical fault indicated on the electrical fault monitoring panel was a dim glow of the LED's associated with the shield and sheath of the 2/C-No. 14 AWG S.T.P.

instrumentation cable in the main cable tray system.

The current flow-through the two LED's was not sufficient to register on'the automatic d.ata logger.

During the extended cool-down period, the electrical fault monitoring circuitry was analyzed to discern the cause of the anomalous electrical fault indications during the fire endurance L

test.

-The electrical fault monitoring circuitry is depicted l

schematically in ILL. 17. - As shown, a de voltage of 120 V is l

connected to a voltage divider. _Two LED's are connected to the voltage divider at multiple points.

The forward diode is yellow and the reverse dicde is red.

The outboard end of the diodes is connected to the test points - (i.e., conductor, shield, sheath and/or' ground). 'When an ohmic 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 LED's associated with two test points ranges between 17 and 104 mA under electrical fault conditions.

t The automatic data logger monitoring current flow through the LED's was configured to indicate O percent up to 4 mA, 100 percent at 20 mA and "overrange" at anything over 20 mA in the forward direction.

Over 20 mA in the reverse direction would also indicate an "overrange" condition.

Based on technical information provided by the manufacturer of the LED's used in the electrical fault monitoring panel, it was thought that' a de current in the range of 16 to 45 mA was required to' illuminate the LED's.

However, it was found that a de current of 0.1 mA was sufficient to cause a visible _ glow in

~

the LED's.

0 e

i l

i l.

File R10925-1 Page 23 Issued:

4-10-84 Based on the above in conjunction with a review of the printed record of current flow through the LED's during the fire it was determined that no electrical faults endurcnce test, occurred in any of the nine fire resistant cable configurations.

Rather, the illumination of the LED's during the fire endurance test was determined.to be an indication of leakage currents Since caused by the temperature effect on insulation resistance.

the decrease in-insulation resistance with temperature is

-reversible, no illumination of the LED's occurred after the The only assembly had been cooled by the water hose stream test.

exception was the LED's associated with the shield and sheath of

- the 2/C-No. 14 AWG S.T.P. instrumentation cable in the main cable tray system.

As indicated earlier in this discussion, the LED's

. associated with the shield and sheath of the 2/C-No. 14 AWG instrumentation cable in the ma n cable tray system i

-S.T.P.

continued to glow visibly following the initial water hose stream Approximately 24 h after the fire endurance-test.was test..

completed, the current flow through the LED's was measured with a

'Simpson Model 260 Volt-Ohm-Milliammeter and was found to be 1 mA.

Approximately-72 h'after the fire endurance test had been completed,.the illumination of the LED's was still perceptible The measured current flow through the LED's but was very, faint.

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 S.T.P.

instrumentation cable in the main cable-tray system under mechanically induced electrical fault conditions was in excess of However,.the measured current flow through the LED's in 20 mA..

Upon further cooling and drying of'the question was only 1:mA.

assembly,.the measured current flow through the LED's in question These observations tend to substantiate had: dropped to 0.1 mA.

the determination'that no electrical faults occurred in the 4

2/C-No. 14 AWG S.T.P.. instrumentation cable and that the illumination of the LED's in question reflected leakage current between the shield' and sheath.

To further substantiate the determination that no electrical faults were present in the nine fire resistant cable configurations, insulation resistance and dielectric voltage-withstand tests were conducted on each conductor of the The results of the insulation resistance and nine cables.

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

e y - - - - -,,,

we----e~,

,,--,-.---,,..-..,,-,4

-,.-.,,,,-,-w,n,%,,.-w,w,,-.,-,-..,,-.,w.,,,ew--r,,---..r--,.-,._w.,%.-__..-.-w.

File R10925-1 Page 32 Issued:

4-10-84 f

As:evidencedLfrom 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 d d cool-down period.

condurance test and during the exten e

. (During the-fire endurance test of the full-scale test (LED's) in the

. assembly, all'of the light emitting diodes

.alectrical fault monitoring panel illuminated.

Based upon an

-analysis of the electrical fault monitoring circuitry and a review of the recorded data, it was determined that no electrical i

faults occurred in the nine fire resistant cable configurations and that the. illumination lof the LED's during the fire endurance test was an indication of leakage current caused by the 5

To determine the temperature effect on. insulation resistance.

levels of-leakage current present in the fire resistant. cables during fire exposure conditions, a second fire endurance test was conducted on nominal 20 ft-lengths of the stainless steel and

. sheathed 3/C-No.14 AWG power cable (Product Code E30-0211) the stainless steel sheathed 2/C-No.- 14 AWG shielded twisted pair (S.T.P.) instrumentation cable (Product Code E30-0212) installed beneath a small-scale floor assembly.

On' March 9, 1984, the small-scale floor assembly was

-subjected to a'78 min fire exposure with-the furnace temperatures controlled in accordance with the ASTM Standard E119 (UL 263, the cables were NFPA No. 251).. During the fire endurance test, connected to a three phase power supply adjusted to provide'three 480/277 V and~960/555 V ac.

The leakage phase Y voltages of current measurements recorded ~during the small-scale test 2.

The J

investigation are contained in Test Record No.

temperatures 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.

f O

t.

v-+-e.

,-,.--.--,.4.---ww--

.--.s--m-.m.,-,..,,w----e v.~.-

w.

m_re..,..,r.+c

,----.-..-.-.,-----,--,...----,-4.

File R10925-1 Page 33 Issued:

4-10-84 Report by:

Reviewed by:

j

^

C.

. JOHNSON R. M.-BERHINIG Engineering Associate Engineering Grou Leader Fire Protection Department Fire Protection Department NYA s

~

K. W. HOWELL Associate Managing Engineer 5

Fire Protection Department R. BEYREIS Managing Engineer Fire-Protection Department CJJ/RMB:pr RPTS3 i

i I

..-,<r.---.,.-

.w..,,,...,__--,,,,_,y,,--

' File'R10925.-l Page A1 Issue.d:

4-10-84 dEEEEEll S

EEE21EE2hk SEEEEEE EEhsg333gg1s F g'k k - S g g h E 15SI 3 S S ! !! g h l 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 ammeter having a range of.0-5 A ac.

The stepdown ratios of the metering transformers were calibrated to obtain the required ~ current (s) as a percentage of ' full scale deflection of the panel ammeters.

The three panelfammeters associated with each

~ three-conductor power cable and the two panel ammeters associated

with the two-conductor shielded twisted pair (S.T.P.)

instrumentation cables were-arranged in vertical rows, as shown in ILL. 16..

It was expected that some. variation in the current p

readings would be present in the individual panel ammeters

" associated with each cable due to the small variations in circuit impedance inherent in applications of three phase loads.

Accordingly,~the center panel ammeter associated with the white conductor of the individual three-conductor power cables was chosen to represent the desired current in each power cable.

.The metering transformer and panel ammeter associated with

. the white ' conductor (center panel ammeter) of each three-conductor power cable and with each group of conductors of the two-conductor.S.T.R. cables were calibrated against a The reference ammeter used to check the reference ammeter.

calibration of the metering transformers and panel ammaters was

~

an Amprobe Model ACD-1 hand-held clamp-on digital ammeter The calibration of the supplied by The Rockbestos Company.

-digital ammater was checked against a calibrated General' Electric 0-800A, 0-750 V hand-held clamp-on. ammeter.

The actual electrical current associated with the panel ammeter reading of each circuit at the desired test current (s) is shown in the following table:

f f

+

..v...-,

.,-.,,.,7,.

_.,...y,.,.3

,..-,rw.

,-.,,..--,,-,.-,,v.m.,

._,,_---m_.,,.-

File R10925-i Page A2 Issued:

4-10-84 s

CURRENT MEASUREMENT CALIBRATION i

steady-state Currone inrush Current Meter Actual Meter Actual Fire Resistant Cable Type Cable t.ocation Readina. A Current. A Readina. A Current. A 3/C-No.14 AWC w/ Stainless conduft-to-Cable 0.8 4.7 4

19.9 Steel Sheath (D 0-0211)

. Tray Transition i~

l 3/C-No. 14 AWC w/ Stainless Cable Tray-to-Cable 0.8 4.1 4

19.4 Steel Sheath (8 0-0211)

Tray Transition 3/C-No. 14 AWC w/o Stain-

' Nom. 3 in. Diameter 0.8 3.8 4.2 20.1 less Steel Sheath (0 0-0208) Conduit Sygtem 3/C No. 6 AWC w/ Stainless Conduit *to-Cable 1.0 30.0 4.0 118 Steel Sheath (D0-0210)

Tray Transition l

l 3/C-No. 6 AWG w/ Stainless Cable Tray-to-Cable 1.0 30.3 4.0 116 l

Steel Sheath (D0-0210)

Tray Transition 3/C-No. 6 AWC w/o Stainless Nom. 3 in. Otameter 1.0 29.1 4.0 120 l:

Steel Sheath ( 8 0-0204)

Conduit System 2/C-No. 14 AWC 3.T.P.

All (4 White Cndrs) 3.5 6.7 N.A.

N.A.

' w/ & w/o Stainless Steel All (4 81ack Cndrs) 4.0 7.7 N.A.

N.A.

j-Sheath (00-0212 & -0209) l The steady-state electrical current in each cable circuit and the inrush electrical current in each power cable circuit-were recorded at various times during the fire endurance test and during the_ extended cool-down period, as shown in the following L

tables.

In each table, the test time (Hr: Min) is the elapsed time from initiation of the fire endurance test.

During the fire endurance test and, in some instances, from the during the extended cool-down period, the voltage output variable transformers to their associated driver transformers was not sufficient to attain the desired inrush currents due to leakage currents.

.In cases where the desired inrush current was not attainable, the maximum attainable inrush current was applied and held for a duration of 30 to 32 s rather than the prescribed 15 s duration.

0 e

.,.,s

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

y

___..,,,,...,r.

.m.

n File"R10925-1 P. age A3 Issued:

4-10-84 ELECTRICAL CURRENT MEASUREMENTS Cable Tvoo - 3/C-No.14 AWC power cable w/ stainless steel sheath (Product Code E30-0211)

Cable Location - Conduit-to-cable tray transition.

. Test Red Conductor White Conductor Black Conductor inrush

Time, Meter Actual Meter Actual Meter Actual Current Hr: Min Readina. A Current. A Reading. A Current.'A Readina. A - Current. A Duration 0:00 0.9 5.3 0.8 4.7 1.0 5.9 0:18-0.8 4.7

0. 6.

3.5 0.8 4.7 0:32 0.8 4.7 0.7 4.1 0.9 5.3 0:43 0.9 5.3.

0.9 5.3 0.9 5.3 0:47 3.4 16.9 3.2 15.9 3.3.

16.4 30 s 0:58 1.0 ;

5.9 0.9 5.3 0.8 4.7 1%-

0.8 4.7 0.7 4.1 0.9 5.3 2:20 4.0 19.9 4.0 19.9 4.0 19.9 17 s-27:34-1.0 -

5.9 0.9 5.3 1.0 5.9 27:39 4.2 20.9 4.1 20.4 4.1 20.4 16 s 48:40 0.9 5.3 0.8 4.7 1.0 5.9 49:10 4.1 20.4-4.0 19.9 4.0 19.9 15 s 76:00

- 0.9 5.3 0.8 4.7 1.0 5.9 79:30 4.1 20.4 4.0 19.9'

~ 4.0 19.9 16 s

- 94:05 4.1 20.4 4.0 19.9 4.0 19.9 15 s i

Cable Tyge - 3/C-No.14 AWC power cable w/ stainless steel sheath (Product Code E30-0211)

Cable location - Cable tray-to* cable tray transition.

Test Red Conductor White Conductor Black Conductor Inrush I'

' Time, Meter-Actual Meter' Actual Meter Actual.

Current Hr: Min Reading. A Current. A Reading. A Current. A Reading. A Current. A Duration L

0:00 0.8 4.1

~ 0.8 4.1 0.8 4.1 0:18 0.8 4.1 0.8 4.1 0.8 4.1

-0:32 0.8 4.1 0.8 4.1 0.8 4.1 -

0:43 0.8 4.1 0.8 4.1 0.8 4.1

' 0:47 3.6 17.5 3.7 17.9 3.6 17.5 30 s 0:58 0.9

' 4.6 0.9 4.6 0.9 4.6 f

1M 0.9 4.6 0.9 4.6 0.9 4.6 l

2:20

.4.0 19.4 4.0 19.4.,

3.9 18.9 17 s l;

27:34-0.9 4.6 0.9 4.6 0.9

.4.6 27:39 4.0 19.4 4.0 19.4 3.9 18.9 15 s

'48:40 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 s 76t00 0.9 4.6 0.8.

4.1 0.8 4.1 79:30 4.0 19.4 4.1' 19.9.

4.0 19.4 21 s 94:05 4.0 19.4 4.0 19.4 3.9 18.9 16 s r

i I

h L-

File R10925-l Page A4 Issued:

4-10-84 Cable Tvoo - 3/C-No.14 ABC power cable w/o stainless steel sheath (Product Code E30-0208)

Cable Location - Nominal 3 in, diameter rigid steel conduit system.

Test Red Conductor-mite Conductor Black Conductor Inrush

Time, Meter Actual Meter Actual Meter Actual Current

• Hr: Min Readine. A Current. A Reading. A Current. A' Reading. A Current. A Duration 0:00 0.8 3.8 0.8 3.8 0.8 3.8 0:18 0.7 3.3 0.7 3.3 0.7 3.3

.0:32-0.8 3.8 0.8 3.8 0.9 4.3 0:43

' O.8 3.8 0.8 3.8 0.9 4.3 t

0:47 3.5 16.8 3.5 16.8 3.6 17.2 30 s 0:58 0.8 3.8 0.8 3.8 0.9 4.3 1:44 0.9 4.3 0.9 4.3 0.9 4.3 2:20 4.0 19.1 4.0 19.1 4.1 19.6 20 s 27:34 0.8 3.8 0.8 3.8 0.9 4.3 27:39 4.0 19.1 4.0 19.1 4.1 19.6 15 s 48:40 0.8 3.8 0.8 3.8 0.9 4.3 49:10 4.0 19.1 4.0,

19.1 4.1 19.6 15 s 76:00 0.8 3.8 O.8 3.8 0.8 3.8 79:30 4.0 19.1 4.0 19.1 4.1 19.6 15 s 94:05 4.0 19.1 4.0 '

19.1 4.1 19.6 15 s Cable Type - 3/C-No. 6 ANC power cable w/ stainless steel sheath (Product Code E30-0210)

Cable Location - Conduit-to-cable tray transition.

Test Red Conductor White Conductor Black Conductor inrush

Time, Meter Actual Meter Actual Meter Actual Current Hr: Min Reading. A Current. A Readino. A Current. A Reading. A Current. A Duration 0:00 0.8 24.0 0.8 24.0-0.8 24.0 0:18 0.6 18.0 0.6 18.0 0.7 21.0

- (Not Recorded) -

0:32 0:43 0.8 24.0 0.8 24.0 0.9 27.0 0:47 2.5 73.8 2.4 70.8 2.5 73.8 30 s 0:58 0.8 24.0 0.6 18.0 0.8 24.0 1:44 0.9 27.0 0.9 27.0 0.9 27.0 2:20

-3.7 109.1 3.7 109.1 3.7 109.1 17 s 27:34 0.8 24.0 0.8 24.0 0.8 24.0 27:39 3.8 112.1 3.8 112.1 3.8 112.1 31 s '

48:40 0.8 24.0 0.7 21.0 0.8 24.0 49:10 3.8 112.1 3.3 112.1 3.9 115.1 30 s 76:00 0.8 24.0 0.7 21.0 0.8 24.0 79:30 3.8 112.1 3.8 112.1 3.9 115.1 31 s 94:05 3.8 112.1 3.9 115.1 3.9 115.1 30 s

File R10925-1 Page AS Issued:

4-10-84 Cable Type'- 3/C-No. 6 AWG power cable w/ stainless steel sheath (Product Ccde E30-0210)

Cable Location - Cable tray-to-cable tray transition.

7est Red Conductor White Conductor Black Conductor in rush 7 tee, Meter Actual Meter Actual Meter Actual Current,

Hern.n Reading. A Current. A Readine. A Current. A Readine. A Current. A Duration 0:00 0.8 24.2 0.8 24.2 0.8 24.2

. 0:18 0.8 24.2 0.7 21.2 0.7 11.2 0:32 0.7 21.2 0.7 21.2 0.7 21.2 0:43 0.8 24.2 0.7 21.2 0.7 21.2 0:47 3.1 89.9 3.0 87.0 3.0 87.0 30 s 0:58 0.9 27.3 0.9 27.3 0.9 27.3

.1:44 0.9 27.3 0.8

.24.2 0.9 27.3 2:20 4.0 116.0 4.0 116.0 4.0 116.0 20 s 27:34 0.9 27.3 0.6 18.2 0.7 21.2 27:39 4.0 116.0 4.0 116.0 4.0 116.0 15 s 48:40 '

O.8 24.2 0.7 21.2 0.8 24.2 4.0 116.0 15 s 49:10 4.0 116.0 4.0 116.0 s

76:00 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 s 94:05 4.0 116.0 4.0 116.0 4.0 116.0 15 s Cable Type - 3/C-No. 6 AwG power cable w/o stainless steel sheath (Product Code E30-0204)

Cable Location = Nominal 3 in, diameter rigid steel conduit system.

7est Red Conductor white Conductor Black Corductor inrush 7 fee, Meter Actual Meter Actual Meter Actual Current HetMin Reading, A Current. A Reading. A Current. A Reading. A Current. A Du rati on 0:00 0.8 23.4 0.8 23.4 0.8 23.4 0:18 0.8 23.4 0.8 23.4 0.8 23.4 0:32 0.8 23.4 0.8 23.4 0.8 23.4 0:43 0.7 20.4 0.7 20.4 0.7 20.4 0:47 2.9 87.0 2.9 87.0 2.9 87.0 30 s 0:58 0.9 26.2 0.9 26.2 0.9 26.2 1:44 0.8 23.4 0.8 23.4 0.8 23.4

-2:20 3.1 93.0 3.1 93.0 3.1 93.0 30 s 27:34-0.8 23.4 0.8 23.4 0.8 23.4 27:39 3.2 96.0 3.2 96.0 3.2 96.0 31 s 48:40 0.7 20.4 0.7 20.4 0.7 20.4 49:10 3.2 96.0 3.2 96.0 3.2 96.0 30 s 76:00 0.7 20.4 0.7 20.4 0.7 20.4 79:30 3.2 96.0 3.2 96.0 3.2 96.0 31 s j

94:05-3.2 94.0 3.2 96.0 3.3 99.0 32 s e

e

File R10925 Page A6 Issued:

4-10-84 Cable Types - 2/C-No. 14 AWG shielded twisted pair (S.T. P. )

i 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: Min Reading, A Current, A Reading, A Current, A 0:00 4.1 7.8 4.1 7.9 0:18 4.3 8.2 4.3 8.3 5

0:32 4.2 8.0 4.1 7.9 0:43 4.0 7.7 4.0 7.7 0:58 4.0 7.7 4.0 7.7 1:44 4.0 7.7 4.0 7.7 27:34 4.0 7.7 4.0 7.7 i

48

40 4.1 7.8 4.1 7.9 76:00.

4.1 7.8 4.1 7.9 e

9 l

l l

1 i

t

File R10925-1 Page B1 Issued:

4-10-84 d E E E E E-1 5 E

IE s y p 3Ils g 3 5 s I sI A u gI MI A 3 3 3 3 3 5 gI s IEkk-sg3ig 23s; ass 33gp1 The insulation resistance ( I. R.-)

of each power cable conductor (one conductor to all others plus sheath / ground) and each shielded twisted pair (s.T.P.) instrumentation cable (conductor to conductor plus shield and shield to sheath / ground) were measured using a General Radio Model 1864 Megohmmeter and a simpson Model 260 Volt-Chm-Milliammater supplied by The Rockbestos Company.

The init.'.al I.R.

test was conducted approximately 18 h before the fi::e endurance test with the jumpers disconnected.

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

The final I.R. test was conducted approximately 96 h after completion of the fire endurance test with the jumpers disconnected.

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

INSULATION RESISTANCE MEASUREMENTS Cable Cable initial I.R.,0has+ interim 1.R.,Chms+ Final I.R. 0hms+

Cable Tray t.ocation Cnde.

(1000Vde-1 Min)

(500Vde-1 Min)

(1000Vde-1 Mini 3/C-No. 14 AWC Condult-To-Red 140C 26C 13C-w/$tnis. Steel Cable fray White 140C GC 4.5C Shesth (00-0211) Tranaltion Stack 160C 14C 6.8C I

l 3/C-No. 14 AWC Cable fray

• Red 900 12C 12C w/$tnis. Steel To-Cable Tray ette 140C 8.8C 7.6C Sheath (00-0211) Transition Black ISOC 9.4G 8.6C 3/C No. 14 AWC Nom. 3 in.

Red 200C 120C 180C l

w/o Stnis. Steel Ofam. Conduit White 2CDC 110G 200C I

Sheath (0 0-0206) System Slack 180C 130C 160C k

3/C-No. 6 AWC Conduit *To*

Red 170C 7.2C 40C w/5tnis. Steel Cable fray White 1000 6.8C 50M Sheath (00-0210) Transition Slack 130C 7C 6.4C E

I l

L

File R10925-1.

Page B2 Issued:

4-10-84 Cable Cable Ini tial 1.R.,0has+

interim I.R.,0hes+ Final ' t.R.,0hes+

Cable tres 1.ocation Cndr.

(1000Vde-1 Min)'

(500Vde-1 Min)

(1000Vde-t Min) 3/C-No. 6 AwC Cable Tray-Red 130C 56C 120C w/Stnis. Steel To-Cable Tray white 130C 80C 54C Sheath (E30-0210) Trenaltion Black

.110C 82C 64C 3/C-No. 6 AwC Nom. 3 in.

Red 200C 170C 180C w/o itnis. Steel Oles. Conduit white 150C 130C 160C Sheath (E30-0204) System 5!ack 160C 170C 180C 2/C-No. 14 AWC Condult-To-White 52C 58C 45C 5.T.P. w/Stnis.

Cable Tray Black 65C 30C 30C Steel Sheath Transi tion Shield 26C++

380k+++

350k (E30-0212) 2/C No.14 AwC Cable Tray-White 60C 40C SON 5.T.P. =/5tni s.

To-Cable fray Slack 66C 22C 200M Steel Sheath Transition Shield 45C++

34k+++

200k (E30-0212) 2/C No. 14 AwC Nom. 3 in, white 68C 110C 95C 5.T.P.w/o Stnis.

Dios. Conduit Black 66C 110C 100C 5 teel Sheath System Shield 110C++

1.2M+++

SM (E30-0209)

- C = Cigaches (1 m Ig ohms)

+

M = Magohns (1 x 10 ohms) 3 k = Kilohns (1 a 10 ohms )

Shf eld-to-sheath / ground at 50Vde*1 Min.

++ -

All other measurem nts Measurements made with Simpson Medel 260 Volt-Chm-Milliaceeter.

+ + + -

made with General Radio Model 1864.t;_-

_ter.

l l

e 0

4

c e--

l File R10925-1 Page C1

. Issued:

4-10-84 ail 11EII E

RII LIEIIIS Y 2 kI A E! III H s I3 3 g II S I S IEgh-ISAh!

- IIs; ass 3ngEI 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 i

the shield, sheath or ground.

The test potentials were applied and measured using an Associated Research, Inc. AC Hypot Junior s

.Model 4025 voltage source.

The AC Hypot Junior Model 4025 is a nondestructive tester

featuring a high reactance type t.ransfortner designed so that the i '

output voltage will collapse should the current output exceed a given value.- The instrument used for.the dielectric voltage-withstand tests described herein was configured to " trip" at a current, output -(leakage current, charging current, corona and/or - break-down current 3) of 1 mA.

-The results of the dielectric voltage-withstand tests are

-shown in the following table.

.OlELECTRIC V01.TAGE-WITHSTAND MEASURO8ENTS Cable Cante

" Trip" Two Minute t

Cable Trey Location conde.

Voltaae. kVac sustained Voltaae. kvac 3/C-No. 14 AWC w/-

Condult*To Red 1.6 1.$

Stainless Steel Cable fray

• t te 2.4

- 2.0 Sheath (E30-0211)

Transition Black 2.2 2.0 3/C-NO.14 AWC w/

Cable fray-To-Red 2.2 2.0 Stainless steel Cable fray

• t te 2.1 2.0

' Sheath (E30-0211)

Troneition Black 2.2 2.0 3/C-Me. 14 AWC w/o Nom. 3 in.

Red 1.7 1.5 Stainless Steel Diam. Conduit White 1.7 1.5 Sheath (E30-020s) system

. Stack 1.5$

1.5 3/C No. 6 AWC w/

Condultafo*

Red 1.$

1.4 Stainless Steel Cable Tray Alte 1.$

1.4 Sheath (E30 0210)

Transition Black 1.5 1.4

File R10925-1 Page C2 Issued:

4-10-84 Cable Cable "Tri p" Two Minuto Cable Trey Location Conde.

Voltaee, kVac Sustained Voltaae. kVac 3/C No. 6 AWC w/

Cable Trey-To-Red 1.3 1.0 Stainless Steel Cable Trey Whi te 1.1 1.0 Sheath (E30-0210)

Transition Slack 1.1 1.0 3/C-N0.6 AWC w/o Nom. 3 In.

Red 1.7 1.5 Stainless Steel Olam. Conduit White 1.7 1.5 Sheesh (E30-0204)

System Slack 1.8 1.5 3/C-No. 14 AwC 5.T.P.

Condult-To-White 2.1 2.0 w/ Stainless Steel Cable Tray Black 2.2 2.0 Sheath (E30-0212)

Transition 2/C-No. 14 AwC 5.T.P.

Cable Tray-To-White 2.1 2.0 w/ Stainless Steel Cable Tray Slack 1.9 1.8 Sheath (E30-0212)

Transition 2/C No. 14 AwC 5.T.P.

Nom. 3 in.

White 2.1 2.0 w/o Stainless Steel Olam. Condult Black 2.2 2.0 Sheath (E30-0200)

System 4

e

r-File R10925-1 Page D1 Issued:

4-10-84 AZEIEE11

-E SAILI IEEE!!AIE!!

HEAEE!!!!EIP sEhkk-sg311 IEs; asigggpx LOCATION OF THERMOCOUPLEs:

The temperatures of each coil of fire resistant cable were

- measured by two inconel-sheathed chromel-alumel thermocouples The thermocouples were affixed having a time constant of 0.5 s.

to the stainless steel sheath of each cable with stainless steel 01.

cable straps and were located as shown in ILL.

. TEMPERATURES OF THE CABLES:

The temperatures measured by-the various thermocouples on 1 min intervals during the fire resistant cables were measured atThese temperatures are tabulated i 02, D3 the fire' test.

and D4.

+

4 4

t e

r.

m File R10925-1 Page El Issue'd:

4-10-84 AZZIERII I

I-E1IEEEEEI EakI11AIIEE HIggags The instruments used to monitor environment, input electrical characteristics and electrical. characteristics of the fire resistant cables during the test program were provided by both Underwriters Laboratories Inc. and The Rockbestos company.

Each of the instruments supplied by Underwriters Laboratories l

Inc. was calibrated against an instrument having calibration The calibration tracekble to the National Bureau of Standards.

records of each instrument-are on file at Underwriters

~

i With the exception of the new Amprobe s

Laboratories Inc.

Model ACD-1. digital ammeter, each of the instruments supplied by The Rockbestos Company bore a pressure-sensitive adhesive label

' indicating recent calibration.

f INSTRUMENTS SUPPLIED BY UNDERWRITERS LABORATORIES INC.:

The'following instruments were used in the test program.

b FULL-SCALE TEST ASSEMBLY Furnace Temperature Recorder - The, temperature recorder used to measure the turnace temperatures was Lee,ds & Northrup, Model G, UL Instrument No. 6FBSTR.

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

Ammeter - 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 General Electric Company, 0-800 A, 0-750 V, UL Asset Identification No. 65 2P9.

. Voltage Source - The. voltage source used to measure Inc.,

dielectric voltage-withstand'was' Associated Research, Mode 1~4025 AC Hypot Junior, UL Instrument No. 1FD5HP.

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

6 e

e

File ~R10925 Page E2 Issued:

4-10-84 SMALL-SCALE TEST ASSEMBLY Furnace Temperature Recorder - The temperature recorder used to measure the furnace temperature was Honeywell Brown Electronik, Model 152P15cPSE-296-III-55, UL Instrument No. 11FB5TR.

i Cable Temperature Recorder - The digital data acquisition system used to measure cable temperatures was Leeds & Northrup, Model Trendscan 1000, UL Instrument No. 2FBSDLS.

INSTRUMENTS SUPPLIED BY THE ROCKBESTCS COMPANY:

The following instruments were used in the test program.

FULL-SCALE TEST ASSEMBLY Digital Ammeter - The reference ammeter used to check the calibration of the metering transformers and panel ammaters was an Amprobe Model ACD-1 (Serial No. 833852) hand-held clamp-on digital ammeter.

The digital ammeter was new and did not bear a calibration sticker.

Mequering Equipment - The equipment used to measure insulation resistance was a General Radio Model 1864 Megohmmeter bearing a calibration sticker reading "I.R.

Set, Serial No. 2311,

~Chacked 4-20-83 by Electrical Calibration Laboratory" and a Simpson 260 Volt-Chm-Milliammeter bearing a calibration sticker reading "I.R. Set, Serial No. 712397, Checked 4-18-83 by Electrical Calibration Laboratory."

SMALL-SCALE TEST ASSEMBLY Digital Multimeters - The four digital-multimeters used to l

measure voltage and current were Beckman 3010 Digital Multimeters.

Each digital multimeter (Units DMM-31027035,

-31027364, -31027435 and -31027447) bore a calibration sticker l-reading " (Unit. Number), Calibrated 3-7-84 by Robt. A. Gehm, New

[

Equipment-Factory Calibrated-Checked AC Amp Ranges."

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CABLE TRAYS,EL30WS & SPt.lCE PLATES MANUFACTUg*0 SY METAL PRODS.

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AUXILIARY CABLE TRAY F"URt. LOADING CABLES:

MAIN CABLE TRAY SYSTEM AND AUXILIARY CABLE TrbW EACM PROVIDED */ RANDOMLY LAtD 41.5% FILL OF FUEL LOADil4G CAGt.ES.

5 h't.ASt.E LCAplNG PERCENT FILL BASED OM 24" CABLE TRAY VAUTH,A OF 67.29 C1 IN. FOR DEPTH AND AGGRE4 ATE CRO5G SECTIONAL art!.

FUEL LOADING CABLES. FUEL LOADING CABLES IN MAIN CABLE TRAY SYSTEM TERMINATE. AT UNDERSIDE OF FLOOR.

THE TYPE AND 00ANTITY OP' FUEL LOADING CABLES IM EACH CABLE TRAY ARE TABULATED BELOW:

CABLE.

CABLE CABLE CABLE 7YPE IN001,. MAT'L.

JACKET MAT'L.

O.D.

QUANTITY 9/C 12AWG EPR/HYP HYP 0858" 16 PCS.

3/C 2AWG Xt.P HYP

l. 03/,"

16 PCS.

37/C 12 AWG XLP PVC l.250" 8 PCS.

19/C.l2 AWG PE PVC 0.935" M PCS, SAMPLE t.OCATION IN CABLE TRAYS RIO925-1 ILL.3

+ NORTH THREAtn.ESS FIBER. BUSHINr.(nflCAQ m

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(CHE 3/C 14A'i!G CABLE ENERGlIED)

STL.SHEATl4(Otat CABLE (2)3/C 6 AWG "'.S STILLS.sTL. SHEATr'.

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THE ROCKBESTOS CO. u1V. OF FILEO R10925 CEROCK. WIRE & CABLE GROUP INC.

PROJECT # 64NK2/

3-9-84.SMALL-SCALE FIRE ENDURANCE TEST

~ THERMOCOUPLE (NQ'S) 1 2

3 4

TIME

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RIO925-1 lLL. D2.

m THElROCKBESTOS CO. DIV. OF FILEM R10925 CEROCK WIREt<CADLE GROUP INC.

PROJECTO S4NL2.

3-9-84 SMALL-SCALE FIRE ENDURANCE TEST THERMOCOUPLE

-(N0'S) ~

1 2

3 4

-TIME

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1748.6 Rio925-1 I L.L. I)23

THE ROCKBESTOS CO. DIV. OF FILE 4 R10925 CEROCK WIREt< CABLE GROUP INC.

PROJECTO S4NK2.3 3-9-84 SMALL-SCALE FIRE ENDURANCE TEST

-THERMOCOUPLE.

(N0'S) 1 2

3 4

. TIME ~

(MIN'S) 1646.2 1611.6 1579.3 1749.7

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