Ideal Electrical 30-454P Wing-Nut Wire Connector, Model 454 Blue, (25/Bag), Large

Copolymer shell expands for smooth, progressive tightening providing dependable connections | Deep skirt helps protect against flash-over and turned-back strands for maximum dielectric protection | Contoured wing design for secure grip, live-action spring expands to accept wire shape and size with no pre-twisting required | Tough UL 94-Volt-2 flame-retardant shell rated at 221F, UL listed to 486C and CSA certified to C22.2 #188 | Product Specifications: For use with #14 to #6 AWG copper conductors, Minimum wire range: three # 12 AWG, maximum wire range: one # 6 with ywo # 8 AWG, Rated to 600-Volt max, 1000-Volt signs and fixtures, Use on bare copper wire