Hook-up wires are used in low current, low voltage (under 1000 V) applications within enclosed electronic equipment. They are also used in control panels, meters, computers, business machines, and appliances. We offer them at industry leading prices. Â Cable Make-up: Hook-up Wire Single conductor wire of annealded tinned copper, insulation of speacial FR-PVC compound of insulation resistance >100M Ohms/Km.Coloursavailable as colour code table no.