ML20215N337
| ML20215N337 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 11/06/1973 |
| From: | Duncan P, Mull H, Rankin H TENNESSEE VALLEY AUTHORITY |
| To: | |
| Shared Package | |
| ML20215N324 | List: |
| References | |
| N2E-860, NUDOCS 8611050257 | |
| Download: ML20215N337 (23) | |
Text
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TENNESSEE VALLEY AUTHORITY DIVISION OF ENGINEERINC OE31CN SEQUOYAH NUCLEAR PIANT CONSTRUCTION SPECIFICATION NO. asa 86o FOR INSTALLING ELECTRICAL CONDUIT SYSTEMS AND CONDUIT BOXES November 6,1973 t
SPONSOR ENGINEER /do,,x. ((
SUBMITTED 4[/[ b REVIEWED /tA,,
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SPECITICATIONS SECTION. at C RECOMMENDED , m , , .
APPROVED I ,, d h v .
Director of Construction APPROVED m .,e-r. /,.// a ,, v
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- Director of Engineering Design L
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CONSTRUCTION SPECIFICATION
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'FOR INSTALLING ELECTRICAL ~ CONDUIT SYSTEMS AND CONDUIT BOXES FOR SEQUOYAH NUCLEAR PLANT PREFACE This specification supersedes General Constructiop Specification No. G-3 for this project.
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CONSTRUCTION SPECIFICATION MR INSTALLING ELECTRICAL CONDUIT SYSTEMS AND CONDUIT BOXES mR SEQUOYAH NUCLEAR PLANT CONTENTS Section Pg 1.0 GENEh!L 1.1 Scope . . . . . . . . . . . . . . . . . . . . . . . ... . 1-1 1.2 Drawings ........................ 1 13 Materials . ..... .................. 1-1 2.0 APPLICATION
( 2.1 2.2
-2.3 2.4 Rigid Steel.Condait .
Aluminum Conduit Nonmetallic Conduit .
Electrical Metallic Tubing (EMF) 2i.1 2-1 2-1 2-1 25 . Flexible Conduit .. .................. 2-2 30 INSTALLATION OF EMBEDDED AND EXPOSED CONDUIT 3.1 Ge ne ral . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 3.2 Specific Instructions for Exposed Conduit. . . . . . . . . 3-3 33 Specific Instructions for Embedded Conduit . . . . . . . 3-3 3.4 Specific Instructions for Aluminum Conduit . . . . . . . 3-4 35 Specific Instructions for Plastic Conduit . . . . . . . 3-4 4.0 CCNDUIT BOXES 4.1 Installation .... .................. 4-1 4.2 Painting . . . . . . . ...... . . . . . . - . . . . . 4-1 43 Seismic Mounting .. .. . ................ 4-1 5.0 JOIIirS AND . BENDS 5.1 Watertight ..... ........... . . . . . . . 5-1 52 Running Threads . . . . . . . . . . . . . . . . . . . . . 5-1 53 Couplings . . . . . . . . . . . . . . . . . . . . . . . . 5-1 5.4 Standard-radius Bends . . . . . . . . . . . . . . . . . . 5-1 55 Field Bends .. .. ........... . . . . . . . 5-1 5.6 Bends For Nonmetallic Conduit . . . . . . . . . . . . . . 5-1 t
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1.0 GENERAL 1.1 Scope The purpose of this specification is to prescribe materials and procedures for insta11 h g the electrical' conduit systems.
These specifications supplement and amplify the instructions
-given on the project drawings.
- 1. 2 Drawings 30A801 - Expan.sion-Contraction Joint for Embedded Aluminum and Steel Conduit 30A803 - Spacing of Steel Conduit Locknuts 30A804 - Dimensions Rigid Metal Conduit Elbows and Bends 30A813 - Conduit Box Design Minimum Requirements 30A820 - Conduit Box Connection, watertight (sloping box top) 30A901 - Electrical Grounding Insert 30B361 - Electrical Equipment Nameplates 30B817 - Conduit Boxes and Covers - Sheet 2 30B1045 - Conduit and Cable Identification Tags 13 Materials The materials used in the installation of. the conduit system shall
(- be in accordance with TVA standard specifications when such specifi-cations are available. Otherwise, they shall have the approval of the Underwriters Laboratories, Incorporated, for the class of service for which they are intended.
1-1
2.0. APPLICATION -
2.1 Rigid Steel Conduit Rigid steel zinc-coated conduit may be used exposed in wet and dry locations and embedded in concrete and soil. It shall not be used as a conduit for one single conductor of an alternating-current circuit. When used in cinder fills, it shall be protected by noncinder concrete at least 2 inches thick. When used.where excessive alkaline conditions exist, it shall be properly protected by a coat of bituminuous paint 3r similar material. Stainless steel and WC coated-steel conduit may be used in corrosive environments. Copper-silicon alloy, brass, or plastic plugs shall be used where spare conduits are plugged in wet places.
2.2 Aluminum Conduit Aluminum conduit may be used exposed in wet and dry locations and embedded in concrete which does not contain calcium-chloride or other alkaline admixtures. It shall not be installed in soil or embedded in concrete structures below ground water level. It shall not be used as a conduit for'one single conductor of an alternating-current circuit except where the installation is specifically designed for such purposes. Aluminum or other nonmagnetic conduit must be used exposed or concealed where
( strong magnetic fields exist. Special conditions will be covered on the drawings. One inch and smaller aluminum conduit shall not be used where during installation or afterwards, it will be r;ubjected to severe mechanical injury.
2.3 Nonmetallic Conduit
- a. Nonmetallic asbestos-cement conduit may be installed embedded or exposed in all locations where steel or aluminum conduit is approved.
- b. Plastic conduit (heavy wall, rigid WC) may be used exposed in wet and dry locations and embedded in concrete and soil. It shall not be used as a conduit for one single conductor of an alternating-current circuit except where the installation is specifically designed fc Csuch purposes. l 2.4 Electrical Metallic Tubing (E!S)
Electrical metallic tubing may be used for both exposed and concealed work to perform, in general and except as set forth below, the same functions as rigid steel conduit. It consists of a threadless, thin-wall steel conduit having a zine-coated outer surface and an enameled inner surface. Tubing shall not be coupled together nor connected to boxes, fittings, or cabinets by means of threads in the wall of the L
2-1
c 3.0 INSTALIATION OF EMBEDDED AND EXPOSED CONDUIT
. 3.1 General
~
- a. Conduit, boxes, fittings, and accessories shall be installed to conform to the latest published regulations of the National
- Electrical Code unless otherwise specified or shown on TVA drawings.
- b. Drawings shall be followed exactly except where specific instruc-
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.tions by drawing notes permit latitude or where obvious inter-ferences occur. Where interferences occur, the Division of Engineering Design shall be notified before any relocations are made,
- c. If it should become necessary to make a field change before consulting the Division of Engineering Design, every precaution shall be taken to ensure that the change is coordinated with other conduit work, structural work, plumbing work, piping, and architectural features; and information shall be obtained regarding the completed conduit run to ensure that there will be no interferences when the conduit run is extended. A complete record of such change shall be sent to the Division of Engineering Design.
- d. Structural steel shall not be cut or drilled to avoid inter-ferences except with the specific approval of the field engineer in each case. -Where the Engineer approves cutting holes in reinforced concrete for conduits, the reinforcing bars shall not be. cut but shall be bent to permit passage of the conduits.
- e. Conduits and fittings shall be properly protect'd e during the construction period against mechanical injury, from impact from structural steel and concrete vibrators, heavy machinery, or batches of mass concrete pours. Conduits which extend out of floors, walls, or beams shall be boxed or otherwise protected, and the ends shall be plugged or capped.
- f. In supporting embedded steel, aluminum or plastic conduit if welding or brazing is used near the conduit, extreme care shall be taken to avoid damage to the surface of the conduit, this is especially important in the case of plastic conduit. In no case shall the conduit be welded or brazed to the support.. Nonmetallic 7
conduit (transite or plastic) in duct runs shall not be supported by reinforcing steel forming closed magnetic loops. Preformed plastic spacers shall be'used.
- g. Concrete curbs shall be provided where specified on conduit drawings.
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lC 3.2 Snecific Instructions for Exposed Conduit Work
- a. Exposed conduits shall be run in straight lines parallel to column lines, walls, or beams. Where conduits are grouped, the bends and fittings shall be installed so as to present
, an orderly appearance. Unnecessary bending or crossing shall i
be avoided.
l b. Supports for exposed horizontal metallic conduit runs shall be provided every 5 feet for 3/4- and 1/2-inch conduit, and not farther apart than 10 feet for 1 inch and larger conduit.
- c. Supports for exposed vertical metallic conduit runs shall be not more than 7 feet for 3/4- and 1-inch conduit and not more than 10 feet for 1-1/4-inch and larger conduit. Concealed
! horizontal and vertical runs in hollow spaces shall be supported j at intervals of 10 feet or less. Capped conduits and conduits i terminating in end boxes or fittings shall be supported not farther than 12 inches from the terminal.
- d. Supports'for nonmetallic conduit _(transite or plastic) shall
' be not more than 5 feet apart, horizontal or vertical.
- e. Malleable iron 1-hole pipe straps, clamps, U-bolts, hangers, or close bracket-type pipe supports may be used. Pipe back- l C spacers may be used for the 1-hole malleable iron pipe supports where it is desired to hold a conduit runway from the surface l
I to eliminate offsetting the conduit at the fittings. I 1
- f. In nonseismic structures galvsnized steel members may be drilled l or punched for conduit supporting bolts, provided the holes are immediately painted with zine-dust zine-oxide paint (Federal Specification TT-P-641d); galvanized or rust-resisting bolts are used; and a lead washer is used against each side of each hole of the structural member. Threaded stud bolts, Nelson stud anchors, or equal, may be used instead of drilling or punching steel members.
33 SDecific Instructions for Embedded Conduit Work
- a. Spacing of embedded cenduits shall be such as to permit the flow of concrete between them. This spacing will vary in accordance with the class of concrete being used for the particular location.
In switchyards and transformer yards a minimum spacing of 1 inch shall be provided to permit passage of 3/4-inch aggregate.
i 3-3
- b. %here plastic conduit is installed in earth, the trench should t3 graded approximately 18 inches deep and be free from stones and coft spots. Sand should be placed in bottom of trench to ensure uniform smoothness. The After conduit is placed, cover with 6 conduit is then inches of placed.
sand and then backfill, this being accomplished in the cool part of the day if possible.
- c. Plastic conduit may be cut with hacksaw. After cutting, ends shall be trimmed and rough edges smoothed. Area to be solvent
- welded (outside of conduit and inside of coupling or fitting) shall be free from dust, dirt, grease, and moisture. -Use Methyl Ethyl Ketone (MEK) for. cleaning. PVC solvent shall be brushed liberally on the end of the conduit and inside the fitting or coupling when making a joint. After fitting has been pushed on, it should be twisted one-fourth turn to spread the solvent evenly. Continue to hold joint for 15 seconds so that conduit does not push out of fitting.
- d. Extreme caution should be observed when any source of heat is near plastic conduit. Field bending can be accomplished by the use of a " hot air-cold air" blower (a hand-type hair dryer is recommended by the manufacturers),
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w 4.0 CONDUIT BOXES 4.1 Installation
- a. Where large boxes are embedded, they shall be properly braced on the inside so that the concrete will not deflect them.
Threaded holes in box frames shall be protected from injury.
- b. Outlet boxes in architectural tile walls shall be installed strictly in-accordance with drawings'and for best' appearance,
- c. Round outlet boxes shall not be used where conduits or connectors requiring the use of locknuts or bushings are to be connected to the side of the box. Rectangular or octangular boxes having at each knockout or opening a flat bearing surface for the locknut or- bushing shall be used.
- d. Surface-mounted boxes located outdoors, in damp locations, or on any mass concrete walls shall be set out from the mounting surface to provide circulation of air behind them.
- e. In completed installations, each outlet box shall be provided with a cover, unless a fixture canopy is used.
( f. Where watertight conduit connections to junction boxes are required, Appleton type HUB conduit hubs or bevelled aluminum or lead washers, as shown on standard drawing 30A820, may be used in place of welded hubs, except aluminum washers shall not be used inside reactor building containme'nt.
- g. Slip cover or hinged covered boxes may be used in the switchyard when frequent access to equipment is required.
4.2 Painting Surface-mounted boxes shall be painted, inside and out, imediately after ' fabrication with best-grade red lead and oil paint. Flush-mounted boxes shall be painted on the inside and the exposed parts only.' Finish coats, for exposed parts, shall harmonize with the general painting scheme about the plant.
4.3 seismic Mounting Conduit boxes, control stations, transfer switches, distribution panels, etc., specified on drawings and located in seismic category I structures shall be mounted to embedded plates where available or with bolt anchors as follows: equipment size up through t
4-1
F 5.0 JOINTS AND BENDS 5.1 Watertight Steel conduit joints and connections shall be made thoroughly water-tight and rustproof by means of the application of a thread compound which will not insulate the joint. Each threaded joint shall be thoroughly cleaned to remove all of the cutting oil before the compound is applied. A compound similar to X-Pando, manufactured by the X-Pando Corporation, 4315 36th Street, Long Island, NY 11101, is suitable for embedded conduits and shall be applied to only the male conduit threads to prevent the obstruction of the raceway.
5.2 Running Threads Running threads shall not be used except when expressly authorized by the Engineer.
53 Couplings Erickson couplings may be used in dry and exposed locations. They may also be used in wet exposed locations in vertical runs only, provided they are installed with fixed threaded connection at top.
Appleton threadless couplings, catalog NTCC, may be used for conduit embedded in concrete and exposed conduit runs. Crouse-( Hinds couplings, catalog UNF, r.ay be used for conduit embedded in soil or crushed stone.
5.4 Standard-Radius Eends Standard-radius bends are generally to be used for metal conduits but special long-radius bends shall t( used wherever specifically called for on the drawings. The long-radius bends are to have radii as large as the physical conditions will permit and never-less than-10 times the nominal diameter of the conduit.
5.5 Field Bends Field bends'for metallic conduit shall be made in such manner that the internal diameter of the conduit is not materially changed, and the protective coating on the inside and also on the outside of the conduit is not injured. The bends shall be free of kinks, indentations, or flattened surfaces. Heat shall not be applied in making any conduit bend.
5.6 Bends for Nonmetallic conduit Bends for nonmetallic conduit are usually purchased as required for the conduit system but for special cases may be made in the field in such =anner as not to impeded the pulling of cables and not to admit water or concrete. Bending of plastic conduit is covered in section 3.5 5-1
6.0 GROUNDING
- a. The entire metallic conduit system, whether embedded or exposed, shall be electrically. continuous and thoroughly grounded. Electrical equipnent secured to and in contact with the grounded structural steel shall be considered grounded.
- b. Welded or brazed grounds on conduit runs shall be done on the top of couplings only, and extreme care shall be taken to avoid injury to the inner surface of the conduit by excessive heating.
The welded or brazed joint shall be insulated with asphaltum, or equal.
- c. Wherever slip joints are used, suitable bonding in accordance with electrical standard drawing 30A801, a part of these specifi-cations, shall be provided around the joint to ensure a continuous ground circuit.
- d. Metallic boxes shall also be connected to the grounding system, unless the conduit connections to the box are made through threaded hubs. If the groundirg conductor is brazed to the box, the joint shall be carefully insulated with asphaltum, or equal.
- e. Aluminum conduit shall be grounded by inserting a galvanized steel coupling in the run and the ground wire brazed to the top C of the coupling and the joint careihlly insulated with asphaltum, or equal. The drawing will show grounding when used for a single phase of a 3-phase circuit.
- f. All couplings, locknuts, and bushings shall be sufficiently tightened in order to avoid hotspots and sparking during fault conditions.
- g. In duct runs, the conduit shall be groundedbetween each manhole or handhole by brazing the ground wire to the top of the conduit coupling or by using grounding bushings.
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T 7 0 DRAINAGE
- a. Conduits shall be sloped for drainage, if possible, and the .
conduit system shall be rigidly supported and braced in position so as to avoid settling and to prevent the formation of pockets when heavy batches of concrete are placed on the conduit,
- b. Where panelboards or electrical equipment are installed in boxes or cabinets, if possible, the conduits entering the top of the box shall be located back of the apparatus in such manner that any leakage of water from the conduits will not drip on the electrical equipment.
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8.0 MARKING
- a. All conduit shall be tagged as decignated on the conduit drawings and in accordance with standard drawing 30B1045
- b. Junctionand/orpullboxes,whichareassignedjunctionboxnum-bers and nameplate numbers on design drawings shall be , identified by attaching the respective nameplate to its box as described in notes on standard drawing 30B361. Junctionand/orpullboxes which have assigned box numbers but have no assigned nameplate numbers on design drawings shall be marked with the applicable color-coding scheme shown in Table B of standard drawing 30B361.
The size lettering shall be detemined by Construction, depending on the box size.
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SHEAR AND FOR }" SHEAR Work insulating utty, oakum or saturated bu aroundoH parts of coupling its and ground streps andjumper to form a covering at least 4
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ORE 55ER COUPLING SONOVOiO place 'Sonoyoid Tube *over completedjoint and fill all voids w g g with oakum and tamp.
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Nominst Locknut Conduit Diameter
" Sise D (Note 1)
Inches Inches
.. . _q 3A 1-3/8 1 1-3A
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3-1/2 5-5/e L 6 5 6-11/16 6 7 -15/16 Sise of Minimum Cleerence
- 3/8" for Embedded Conduit (Ncte 2)
Conduit Inches 3A 1 1-1A 1-1/2 2 2-1/2 3 3-1/2 h 5 6 A 1.75 1.% 2.22 2.28 2.66 2 94 3 50 3 28 h.J7 L.h1 5 33 34 8 .70 .76 .87 .81 .c5 9c 1.23 1 36 1 33 1.1; 1.19 A 1.Sh 2.13 2.h1 2.h7 2.25 3 13 3.?c h. ,.? h.26 4.60 5 22 y
8 .76 .81 93 .P5 1.01 1.Ch 1 30 1.h2 1 36 1.16 1.25 2.22 2.hl 2.69 2.76 3 12 3.L0 348 h.35 h Sh h Be 5 53
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, A B .67 93 1.03 90 1.11 1.15 1.hc 1 52 1.L6 1.27 1.35 A 2.2a 2.h7 2.76 2.el 3 19 3.R h.ch L.k1 h.61 h.9h 5 56 1 2 .81 .05 9e .?1 1.f4 1.09 1 34 1.h6 1.k1 1.21 1.30 C_
B A 2.65 2.05 3 12 3 19 3 57 3.e5 h.h2 L.79 h.99 5 31 5.%
2 1.01 1.11 1.c4 1.20 1.23 1.h9 1.61 1 56 1 34 1.hh B 95 A 2.% 3 13 3.h1 3.L' 3.C5 h.13 h.70 5.C7 5 27 5 59 6.22 2-1/2 B 98 1.Ch 1.15 1.09 1.23 1.26 1 52 1.6h 1 59 1.37 1.L7 A 3 5c 3 70 3 98 L.c4 4.h2 h.'O 5 23 5 63 5 81 6.16 6.78 3
B 1.23 1 30 1.h0 1 3h 1.h9 1 52 1 77 1.e9 1.sh 1,63 1.71 A 3 88 h.77 L.35 h.h1 L.79 5.U7 5 63 6.cl 6.21 6.53 7 16 3-1/2 8 1 36 1.h2 1 52 1.h6 1,61 1.6h 1 09 2.01 1.o6 1.75 1.eh A h.C7 h.26 L.5h h 61 L.99 5 27 5 81 6.21 6.40 6.72 7.3h g 1.84 1.e4 1 90 1,69 1.77 8 1.30 1 36 1.16 1.h1 1 56 1 59 A h.h1 h.63 h.88 h.9h 5 31 5 59 6.16 6.53 6.72 7 06 7.69 5 e 1.10 1.16 1.27 1.21 1 3h 1 37 1.63 1.75 1.69 1 50 1 59 A 5.c3 5 22 5 50 5 56 5 9h 6.22 6.70 7.16 7 3h 7.69 8 31 6 1.71 1.Ph 1.77 1 59 1.68 B 1.10 1.25 1.35 1 30 1.Lh 1.h7 Notect
- 1. Overall atmens tone of loennute very with l
mar.u t se t ure rs. .no atometers listed are considered as coine. e.en tarm almensions.
ELECTRICAL STANDARDS
- 2. Inc s intum clearsace snown ohell be in- j cresees where posettle so that dimension n .t11 ee 2a or rester to permit tne SPACING OF STEEL l flos of concrete between conduits. 1 1/P.,
CONDUlT LOCKNUTS )
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DESIGN AND DRAFTING STANDARDS TENNEsstj VA,L,Lg AUTMoniTV
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RECC)AENDED MINIIEIM FIELD CONDUIT BENDS - 90' RADIUS ( Note 1 )
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Dimensions - Inches
% Site - In. g ,
>h 3A 8-3/16 7 -13/16 g'%.k. I 10-3/8 9-7A l
4b 1-1A 13-13/16 13-1/8 1-1/2 16-1A 15-5/16 2 20-5A 19-9/16 h 2-1A 3
th-5 8 30-5/8 25-3h 29-1/16 3-1/2 35-7 /16 33-5/8 h hc-5/16 38-5/16 5 50-1/2 14 6 60-11/16 57 -11/16 STANDARD MANUFMIURER'S CONDUIT ELBOWS - 90' RADIUS (Note 2)
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Maensions - Inchs L D _
Inah** A a C o C a T 3A h-1/2 h 7-25/32 2 15/16 g'% 1 5-3A 5-1/16 8-11/16 3 Q 1-1A 7-1A 6-7 /16 115/32 3 1/32
_- 1-1/2 8-1A 7-5/16 11-5/8 3-7/16
_,_ Q 2 9-1/2 8-5/16 13 13/16 k-5/16 M r 2-1/2 3
10-1/2 13 9-1/16 16-3/16 5-11/16 11-1/4 20 1/8 7-1/8 L C 3-1A 15 13 22-5/8 7-3/4 h 16 13-3A 25-3/16 9-3/16 2h 21-1A 35 11 5
6 30 26 11/16 h2-1/2 12-1/2 leotes:
- 1. Conduit bonde when sende in the field eball have e minimum radius of 10 times the nose-inal inside diemster of the conduit.
- 2. Standard manuraeturer's bende shall be used ELECTRICAL STANDARDS only where conduite turn out of floor elate, at conduit terminale, or et evitahboarde. DIMENSIONS RIGID METAL CONDUIT, i 01MEL" ELBOWS & BENDS
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DESIGN AND DRAFTING STANDARDS TENNESSEE V E UTH ORtT Y
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l TYPE 1 TYPE 2 TYn 3
!!eight, H = 3r; + A +A2+E H = 3 r, + 3 H = kr, Width. W = 3rg+Ag+A2 *E N=A +A 2
- 2Z N*Al*A2
- 2S Depth. F = D + (2 x elearance). F = 1 5 r, F = D + (2 x clearance)
Ir 3r le greater than (3rg + q) then Height. H = 3r
+A2*B Width. W = 3 r, + A2+E Notations:
q = 1/2(lockr.ut diameterg + lo & ut h u r2 * ' ' * " " * "
- A2 = 1/2(10 knut diameter 2 + locknut diameter)) + clearances. (See Note)
D = locknut diameter. (See Note) dy= diameter inside cable.
d = diameter naximum cable.
E = 1/2 locknut dinneter + clearance.
F = lecknut dinneter + (2 x clearance).
rg = mini _nn bendir.g radius inside cable.
r, = ntni u= bending radius r.aximum site cable.
Noter 1.ocknut diameter above refers to maximum overall dimension.
For values of A g. A 2 . and D. see Electrieel Standard 30A903.
For types or bones see Ctandard Drawind 3CB815.
ELECTRICAL STANDARDS CONDUlT BOX DESIGN
<>ii1 i MINIMUM REQUIREMENTS
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sua . e. . DESIGN AND DRAFTING STANDARDS
_ n ma .,,, s me. TENNESSEE VALLEY esseem eiwwew,UTHORITY A
_ = m e, 1 eh ~f,f CCA*PANION ORAW! hts: 30A8td 8 208815 f l ' '
I I I I -oxv us ...a lcjc(oj sore %
.i
W Beveled washer Lock nut m _
l ; _- m
? - -
ErBushing f
ILi- 5
.j =
{
=
% Lock nut Beveled washer L[ k 4
i NOTES:
- 1. See speafication G3, section J. 8. for alternate method. ^
- 2. Source ofaluminum washers:
Anderson Electric Company.
ELECTRICAL STANDARDS CONOUlT BOX CONNECTION u - ,-- . .. .
(WATERTIGHT)
,,,, i n a, ' l.,, .
4... GENERAL '
,,,,o, TEN N ESSEC...V.AL,LE.:Y
.. ne AUTHORITY l
.N ;
, 8 M 9 /O.
i ! ' onvius
== is ie en l o I e { 4130 A820 ae l
.*
_ j' I* _,_j' _- m C _
1 ,r.
%wtgp1 u m1 i
i m , a,i C
3
~
BM ,
ll
,, !q
< ! i, 1 l i i i !
O. !
EM l I
ll l
h 1
f i e t _
)
= Drill and tap for /* cap (
screws,16 threeds per inch.
PLAN SIDE ELEVATION (Finish r t .--i i n o L=0 (_'_'_"~_l t
4 tr.-1 .)
F = -1
- r. .)
(
p.
pCl 6.T.1 .
e - -J L - -J ; ?
o %
k f .9 .-
' ~ _g NOTES:
Material shall be cast copper in accord-
, 7- ), R ance with ASTM B30-39, Alloy Na 4Aor54.
s __L Brazing h be done with Phos-Copper l Alloy or equal af time of installation.
l -1000mcm i
I
- //* -
Scale /*=l*
END ELEVATION
. STANDARD DRAWING it#/M gr? w ELECTRICAL
% vims t u Eggges GROUNDING INSERT e -- -;-. i- i.-i-cENERAL
'fh/['
j " "" Y en$se[n'tuent ['
j l'l-~~~
MR/l /i_ fl /
THIS DRAWING SUPERSEDES 30A37/ar Q f5 [hf_x u no rvidt. tras. I in-s 30 iG i f l4 !30A90les
O tae WD &D nad oe s ta't
- W
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g 3 5
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