Short Circuit Forces

The forces of repulsion between the individual phases of a three phase system cables under fault conditions can be considerable. The cable cleats selected must be capable of withstanding these repulsive forces, which are exacerbated when the cables involved are single core cables.

The short circuit forces generated during fault conditions will be governed by a number of factors, and not just by the type of short circuit. CMP Products cable cleats have been tested and certified in accordance with IEC 61914 for the worst case scenario, a three phase short circuit. The effects of other types of short circuits will create considerably less forces on the cables, nevertheless any short circuit has the potential to develop into a three phase short circuit.