Installation Manual

3.2.3Installations with More Than 50,000 Amps Available Fault Current.

Where available fault current exceeds 50,000 amps, follow recommended cable restraints as shown in Figure 3-1.

Figure 3-1: Cable Restraint Configuration for Fault Currents Exceeding 50,000 Amps. (UL891)

To Conduit End

B

A

6inches (152m)

A

6inches (152m)

POWER TERMINALS

!CAUTION: HAZARD OF CONDUCTOR MOVEMENT UNDER SHORT-CIRCUIT CONDITIONS. Restrain conductors in installations where available fault current exceeds 50kva.

Failure to observe these precautions can result in conductors pulling out of the lugs or damage to this equipment.

Wrap line cables together and secure cables using:

ANominal 3/8-inch (9.5m) Nylon rope or rope having a minimum tensile strength of 2000 Lbs (8896 N) at 6 inches (152m) and

12 inches (305mm) from the terminals with five wraps, and

Bevery additional 6 inches with five wraps or every 1 inch (25.4m) with one wrap.

IMPORTANT: Hazard of conductor movement under short-circuit conditions.

Restrain customer bypass conductors where available fault currents exceeds 50,000 amps.

Installation

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