A type of hookup wire with a highly stranded bare copper conductor typically used in control cabinets, machine tool applications, and appliance wiring applications such as HVAC equipment. Global Cable and Wire offers a wide selection of Type MTW wire products at the best prices you’ll find anywhere. Applications for MTW Wires are best for use in dry locations at 90°C, or not to exceed 60°C in wet locations or where exposed to oils or coolants.