Rack: 3 Wire Knob

Formed channel steel secondary racks come with insulators securely attached by U-bolts to withstand strains in all directions. The wide flanges on the base make them sutiable for mounting on poles or walls. The conductors are tied in the top insulator groove, leaving the centre hole free for service wires.
Two items provide mounting for 5/8" (15.9 mm) or 3/4" (19 mm) machine bolts.