Three or four copper conductors, stranded and insulated with heat and moisture resistant, chemically crosslinked polyethylene (type XHHW- 2 or RW90), cabled together with a left hand lay and messenger of 30% EHS copperweld, laid parallel and bound with a flat bare copper binding strap. Available with galvanized or stainless steel messengers, PVC coated copper, and stainless steel strap.