GE circuit breaker enclosures are UL listed, CSA certified and are suitable for use as service equipment (except as noted). The short circuit rating of the enclosure/circuit breaker combination is equal to the short circuit rating of the installed circuit breaker. Spectra® RMS circuit breakers are suitable for use on AC systems only frame notes and/or restrictions 2 and 3-pole only enclosure notes and/or limitation enclosure includes removable closing cap.