The enclosures for the family of PowerPact circuit breakers H- through Q-frame are cULus listed unless otherwise noted. The enclosures are suitable for service entrance equipment when neutral assembly is installed. The short circuit current rating of the enclosed circuit breakers is equal to the rating of the circuit breaker installed unless otherwise noted. All enclosures will accept 80% rated circuit breakers. The M800R and the P1200R enclosures have a blank top end wall and require field-cut openings. This is a PowerPact M,Molded Case Circuit Breaker Enclosure, 300A to 800A, TYPE 3R. This enclosure is made from steel. This enclosure complies to UL & CSA certifications. The dimensions are 1025.52 mm (H), 533.4 mm (W), 247.65 mm (D). This product comes with an 18 month warranty.