![]() ![]() Adopting this approach simplifies the calculation and errs on the safe side. When calculating the fault ratings of a cable, it is generally assumed that the duration so short enough that no heat is dissipated by the cable to the surrounding. The primary concern with cables under a fault condition is the heat generated, and any potential negative effect this may have on the cable insulation.Ĭalculation of fault rating is based on the principle that the protective device will isolate the fault in a time limit such that the permitted temperature rise within the cable will not be exceeded. It is important that calculations be carried out to ensure that any cable is able to withstand the effects of any potential fault or short circuit. ![]() When selecting a cable, the performance of the cable under fault conditions is an important consideration. ![]()
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