The standard uses a three-step approach to find the permissible current: Adiabatic Current ( IADcap I sub cap A cap D end-sub

assumes that all heat generated by the short-circuit current remains within the conductor. This is reasonably accurate for very short durations (less than 0.1 seconds) or large conductors.

): Multiply the adiabatic current by the non-adiabatic factor ( Adiabatic Formula