Single phase, 3-wire, 4-jaw, 600 VAC maximum. 10,000 RMS symmetrical amp short circuit current rating. Hub provisions have an A-type size and its enclosure is made of aluminum. Supplied with bonded neutral. Requires bolt-on hub or closing plate (not included) for hub opening in top endwall. Bypass and jaw release sold separately. It can accommodate buildings supplied by overhead power lines or underground cables. UL listed.