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. The enclosure accepts 80% or 100% rated circuit breakers. This enclosure is suitable only for 2 pole HD or HG breakers. It is suitable for use as service equipment when neutral assembly is installed. It is a NEMA 3R gray baked enamel over steel. This PowerPacT H, enclosure is for a 2-pole circuit breakers and has a NEMA 3R rating.