Mersen open style mini box to box power distribution block with 3-pole and 1 stud for cable terminations. Block afford a safe, convenient way of splicing cables, splitting primary power into a variety of secondary circuits or providing a fixed junction tap-off point. Power block options include primary connections with up to secondary connections. Studs are furnished with nuts and washers. Standard aluminum box connectors accommodate aluminum or copper wire, 1 conductor per opening. Insulators are virtually unbreakable, glass-filled polycarbonate. 100kA short circuit current rating. 600VAC voltage rating. 2/0-#14 wire size. 185 ampere current rating. Approvals: Most sizes are UL Recognized Component -Guide XCFR2, File E73571.