PowerPact H-Frame enclosures' maximum short circuit ratings are 25 kAIR at 600 Vac, 65 kAIR at 480 Vac, 125 kAIR at 240 Vac and 20 kA at 250 Vdc unless otherwise noted. Enclosures accept 100% rated circuit breakers use only 90C (minimum) rated wire sized per ampacity of 75C rated conductors for 100% rated circuit breakers. The enclosures are not compatible with earth leakage or ground-fault modules. H- and J-frame circuit breakers with Micrologic trip units can be used with these enclosures, but have limitations. No communication accessories can be mounted in the enclosure (no IFM or Front Display Module, IFE, etc). The trip unit will not be accessible or visible without the removal of the cover. For LSIG, there is no room for the NCT to mount in the enclosure. This PowerPact H, enclosure is for a 2-pole circuit breakers and has a NEMA 1 rating. This enclosure complies to UL & CSA standards. With a short circuit rating of 25kAIR@600VAC and will accept 100% rated circuit breakers. This enclosure is not compatable with earth-leakage or ground-fault modules. Dimensions for this enclosure are 31.36 in (H), 14.36 in (W), 6.00 in (D).