Feed through lugs. Single phase, 3-wire, bonded neutral, 8 total 1-pole spaces, 120/240 VoltAC. 10,000 AIC. Four 1-pole or two 2-pole 1 inch THQL spaces, eight 1-pole or three 2-pole 1/2 inch THQP spaces. Main breaker factory installed. 6 to 350 main wire size. Padlock provisions on door. Hinged door is removable for safety and convenience. 14 inch x 28 inch x 4-1/2 inch UL listed. Meets EUSERC requirements.