Circuit Protection How to determine the short-circuit current rating (SCCR) of a control panel The UL 508A standard follows the step-by-step process in the post when determining the short-circuit current rating (SCCR) of a control panel. More > Tagged circuit breaker, Circuit Protection, control panel, electrical, fuse, how to, littelfuse, mersen, Rittal, SCCR, short circuit current rating