Cable Short-circuit capability


All cables should be checked to ensure they are capable of carrying the available fault current. The shortcircuit rating of an insulated conductor is based on the maximum allowable conductor temperature and insulation temperature. Conductor temperature is dependent on the current magnitude and duration. Equation (C.14) is used to estimate conductor temperature and is valid only for short durations. The maximum recommended conductor temperature is 250 °C to prevent conductor annealing.





source: IEEE Std 525-2007