GE's 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...Enclosure notes and/or limitation: For 3 phase, 4-wire ground fault, order neutral kit and neutral current sensor kit (kits must be mounted in enclosure)..Enclosure does not include knockouts (NEMA Type 12)....ACCESSORIES:.Neutral Kit (non-GF applications):TNIA400.Neutral Kit(s) (for GF applications): TNIA400VG.Neutral Current Sensor(s) (for GF applications): TSRG201, TSRG204