Machine Tool Wire (MTW)

Machine Tool Wire (MTW) consists of stranded, soft annealed copper conductors insulated with Polyvinylchloride (PVC). MTW is UL rated for 600 volts. #10, 12, and 14AWG are 19 strands, all others are "highly flexible" stranding constructions. The Appliance Wiring Material (AWM) constructions may be solid or stranded and are available in 1000 V ratings.

Canadian Standards Association (CSA) listed AWM-IA (Class I Group A) and TEW products are 600 V FT-1 rated. All our standard products are compliant and multi-listed as types TW, THW, MTW, TEW, and the applicable AWM Style Number.

Type MTW/TEW is most often found in general purpose wiring circuits, for machine tool wiring and the internal wiring of appliances, such as control panels, wiring for refrigeration equipment, air-conditioning equipment, control wiring of machine tools, automatic washers, etc. It can be used in dry locations up to 90°C (ampacity is limited to 75°C conductor temperature per NFPA 79); or wet locations or other applicable locations when exposed to oil or coolant at temperatures up to 60°C. CSA Type TEW rating permits use in dry locations up to 105°C; or wet locations or other applicable locations when exposed to oil or coolant at temperatures up to 60°C.

Our standard circuit size (#10, 12, 14 awg) products are marked Style 1015. Larger MTW products are marked AWM 1028 or 1283. The governing standard for application of these products is the National Fire Protection Association (NFPA) Publication #79.