Flexibility is the hallmark of the P1 panel, with this design, the ability to mix breakerframes in unit space up to 250 amps. P2 is set up around 18, 30, 42, 54, 66,78, 90, 102.114 circuit configurations. Voltage – 600V AC max.250V DC max. Amperage – 600 amp max. Short circuit rating 20KA Maximum /10KA @ 600 Vac. Made of cold rolled gauge steel finished with gray paint, they are certified listed CSA. P1 panel boards are pre-engineered to accept the most common modifications without increasing box height. The enclosure size is determined by the number of circuits. All P1 main lug or main breaker panel boards have space built-in to accept either feed-thru lugs equal to the panel rating, one sub feed circuit breaker up to 250 amperes or a surge suppressor (TVSS) without increasing box height. the innovative P1 lighting panel boards: Symmetrical Interiors. No top or bottom. To change from top to bottom (or vice-versa), simply invert the interior. The dead front labeling is always right-side up. First in the Industry Ratings of 125 through 400A main lug and main breaker. Field convertible from main lug to main breaker and vice versa, with no increase in enclosure height. Field adaptability of feed-thru lugs or sub feed circuit breaker without increasing enclosure size. Neutral system is field upgradeable to 200% capacity – another industry first. Three circuit sizes means only three box heights, regardless of main configuration through 250 amp and an additional three circuit version and boxes available at 400 amps. Suitable for use as service entrance given compliance with NEC. Bonding provisions are shipped with each panel. 240V and 480Y / 277V for versions utilize identical boxes and fronts. Enclosure: Standard Type 1 enclosure is 20 wide x 5.75 deep. Box Height is determined only by the number of circuits, not by main lug or main circuit breaker.