Cooper Bussmann CT02MAN manual Cable Installation. a Cable Splices

Cable Tray Label

WARNING! Do Not Use As A Walkway, Ladder, Or Support For Personnel.

Use Only As A Mechanical Support For Cables, Tubing and Raceways.

Catalog Number:	24A09-12-144 STR SECTION
(and description)
Shipping Ticket:	260203 00 001
Mark Number:	78101115400
Purchase Order:	D798981
Minimum Area:	1.000 SQ. IN.
Load Class:	D1 179 KG/M 3 METER SPAN

REFERENCE FILE # LR360266

This product is classified by Underwriters Laboratories, Inc. as to its suitability as an equipment grounding conductor only. 556E

1 of 1	VENTILATED
	09/05/2002

816 LIONS DRIVE

TROY, IL 62294

(618) 667-6779

30781011154005

392.8. Cable Installation. (A) Cable Splices.

There is no safety problem due to cable splices being made in cable trays if quality splicing kits are used, provided that the splice kits do not project above the siderails and that they are accessible. A box or fitting is not required for a cable splice in a cable tray

392.8.Cable Installation. (B) Fastened Securely.

There is no safety or technical reason to tie down multiconductor cables in horizontal cable tray runs unless the cable spacing needs to be maintained or the cables need to be confined to a specific location in the cable tray. In non-horizontal cable tray runs, small multiconductor cables should be tied down at 3 or 4 foot intervals and larger (1 inch diameter and above) Type MC and Type TC multiconductor cables should be tied down at 6 foot intervals. If used outdoors, plastic ties should be sunlight, ultraviolet (UV), resistant and be made of a material that is compatible with the industrial environment. Installed outdoors, white nylon plastic ties without a UV resistant additive will last 8 to 14 months before breaking. Also available for these applications are stainless steel ties and P-clamps.

(P-Clamp shown installed on industrial aluminum rung)

For single conductor cables installed in cable tray in a single layer, each single conductor cable should be tied to the cable tray at 6 foot intervals. Where a circuit group of single conductors (Phase A, Phase B, Phase C, and a Neutral if used) are bound together with ties, the ties should be at three or four foot intervals. In horizontal cable tray runs, the circuit groups with ties do not have to be tied to the cable tray. Where ties are used, they should be made from high strength UV resistant plastic or stainless steel. The high amperages flowing under fault conditions in the 1/0 and larger cables produce strong magnetic fields which result in the conductors repelling each other until the circuit protective device de-energizes the circuit. Under such conditions, the cables might be forced out of the cable tray. This happened at a northern Florida textile plant where several hundred feet of Type MV single conductor cable was forced out of a cable tray run by an electrical fault because the cables were not tied down properly.

Cooper B-Line, Inc Cable Tray Manual

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