Steel City® Indoor Boxes & Covers - Thomas & Betts - (Version JPG) - Page n° 4 - PDF Catalogue | Technical Documentation

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Steel City

Overview

Article 314 — Boxes and Fittings (continued)

16(A)

Table 314.16(B)

Volume Allowance Required per Conductor

Metal Boxes


BOX TRADE SIZE MM (IN.)	MINIMUM VOLUME CM3 IN.3	*MAXIMUM NUMBER OF CONDUCTORS 18 16 14 12 10 8 6**

100 x 32 (4 x 1J4) Round/Octagonal	205 12.5	8 7 6 5 5 5 2
100 x 38 (4 x VA) Round/Octagonal	254 15.5	10 8 7 6 6 5 3
100 x 54 (4 x 2^ Round/Octagonal	353 21.5	14 12 10 9 8 7 4
100 x 32 (4 x 1!4 Square	295 18.0	12 10 9 8 7 6 3
100 x 38 (4 x 1!/!) Square	344 21.0	14 12 10 9 8 7 4
100 x 54 (4 x 2^ Square	497 30.3	20 17 15 13 12 10 6
120 x 32 (4L x 114) Square	418 25.5	17 14 12 11 19 8 5
120 x 38 (4L x 112) Square	484 29.5	19 16 14 13 11 9 5
120 x 54 (4L x 218) Square	689 42.0	28 24 21 18 16 14 8
75 x 50 x 38 (3 x 2 x 1$ Device	123 7.5	5433321
75 x 50 x 50 (3 x 2 x 2) Device	164 10.0	6 5 5 4 4 3 2
75 x 50 x 57 (3 x 2 x 2$ Device	172 10.5	7654432
75 x 50 x 65 (3 x 2 x 2$ Device	205 12.5	8765542
75 x 50 x 70 (3 x 2 x 2^ Device	230 14.0	9876542
75 x 50 x 90 (3 x 2 x 3$ Device	295 18.0	12 10 9 8 7 6 3
100 x 54 x 38(4 x 7Ax 1$ Device	169 10.3	6554432
100 x 54 x 48(4 x 7Ax 1$ Device	213 13.0	8765542
100 x 54 x 54(4 x 2Ax 2^ Device	238 14.5	9876542
95 x 50 x 65 (3%x 2 x 2A) Masonry Box/Gang	230 14.0	9876542
95 x 50 x 90 (3%x 2 x 3A) Masonry Box/Gang Min. 44.5 depth FS - Single Cover/Gang (1 $	244 21.0 221 13.5	14 12 10 9 8 7 2 9766542
Min. 60.3 depth FD - Single Cover/Gang (2$	295 18.0	12 10 9 8 7 6 3
Min. 44.5 depth FS - Multiple Cover/Gang (1 ^	295 18.0	12 10 9 8 7 6 3
Min. 60.3 depth FD - Multiple Cover/Gang (2$	395 24.0	16 13 12 10 9 8 4


SIZE OF CONDUCTOR	FREE SPACE WITHIN BOX FOR EACH CONDUCTOR
(AWG)	CM³	IN.³
No. 18	24.6	1.50
No. 16	28.7	1.75
No. 14	32.8	2.00
No. 12	36.9	2.25
No. 10	41.0	2.50
No. 8	49.2	3.00
No. 6	81.9	5.00
Reprinted with permission from National Fire Protection Association 70-1987. National Electrical Code, Copyright© 1986, National Fire Protection Association, Quincy, MA 02269.

This reprinted material is not the complete and official position of the NFPA on the referenced subject which is represented only by the standard in its entirety. NEC® is a registered trademark of the National Fire Protection Association, Inc., Quincy, MA 02269.

Underwriters Laboratories Inc. File Number: E2969 (U.L. 514A) Canadian Standards Association File Number: LR 12798

Federal Manufacture Number: 56501

Products designed to meet Federal Specification Number: A-A5924 (formerly W-J-800). Verification of file numbers and compliance with federal specifications for individual items available upon request.

Box and cover material and plating specification; .062" minimum thickness,

hot rolled, pre-galvanized steel, minimum spangle.

ASTM G-60-U, AISI C-1008

Bracket material: All brackets except MS style; 16 gauge (.060") hot rolled, pre-galvanized steel AISI C-1008, G-60-U. MS Style bracket; 20 gauge (.036") cold rolled spring steel AISI C-1055, heat treated to R. 35 zinc plated .0005 thick.

*Where no volume allowances are required by 314.16(B)(2) through 314.16(B)(5).

Underwriters Laboratories Inc. File Number: E2969 (U.L. 514A)

Canadian Standards Association File Number: LR 12798

Federal Manufacture Number: 56501 (Cage Code)

Products designed to meet Federal Specification Number: W-J-800

Verification of file numbers and compliance with federal specifications for individual items

available upon request.

Box and cover material and plating specification; .062" minimum thickness, hot rolled, pre-galvanized steel, minimum spangle.

ASTM G-60-U, AISI C-1008

Bracket material: All brackets except MS style; 16 gauge (.060") hot rolled, pre-galvanized steel AISI C-1008, G-90-U. MS style bracket; 20 gauge (.036") cold rolled spring steel AISI C-1055, heat treated to R. 35 zinc plated .0005 thick.

Metallic Boxes — Fire Resistance Rating

Wall Penetrations

Listed single and double gang metallic outlet and switch boxes and octagon ceiling boxes with metallic or non-metallic cover plates may be used in

bearing and non-bearing wood stud and steel stud walls with ratings not

exceeding 2 hours. These walls shall have gypsum wallboard facings similar to those shown in Design Nos. U301, U411, and U425. 4 in. square boxes may be used in 2 hr. fire rated ceilings.

The surface area of individual metallic outlet or switch boxes shall not exceed 16 sq. in. The aggregate surface area of the boxes shall not exceed 100 sq. inches per 100 sq. ft. of wall. Boxes located on opposite sides of walls or partitions shall be separated by a horizontal distance of 24 inches.

The metallic outlet or switch boxes shall be securely fastened to the studs and the opening in the wallboard facing shall be cut so that the clearance between the box and the wallboard does not exceed % in.

Steel City® Indoor Boxes & Covers - Thomas & Betts - #4

Cable protection conduit, Circular connector, Cable trunking, Cable clamp, Rectangular connector