Machine Tool Wire Ampacity

Control cabinets in machine tool applica tions and in appliance wiring applications.

Machine tool wire ampacity.

Our selection of mtw bare copper and tew tinned copper presents the best wire options for every function. Ampacity based on nfpa 79 table 12 5 1 for use with industrial machinery applications. Mtw stands for machine tool wire and as the name implies its primary uses are related to the wiring of machine tools appliances and control cabinets. Diameter min color put up reel reel size put up barrel 12.

The above data is approximate and subject to normal manufacturing tolerances. Certain sizes and colors are also available in 2500 foot reels. Voltage rating for all applications is 600 volts. Encore wire corporation size awg type mtw 600 volts gr i vw 1 ul or awm or c ul type tew ft1 listed.

It is a pvc hookup wire and although machine tool wire is qualified for many wiring applications it is a simply constructed wire that is made up of a highly stranded bare copper conductor. Mtw wire tew wire pass the vw 1 flame test and are also moisture resistant. Machine tool wire mtw consists of stranded soft annealed copper conductors insulated with polyvinylchloride pvc. Badger wire cables machine tool wire.

Conductor sizes 18 awg through 2 awg. Applications for machine tool wire include use with switchboards appliances electronic circuits and control cabinets and of course the wiring of machine tools. Ampacities are based on table 310 15 b 16 of the nec 2014 edition. Mtw is a machine tool wire with a bare copper conductor and pvc insulation that is available in a variety of colors for identification purposes.

For use in accordance with the national jacket electrical code nec and nfpa standard 79. Wdt id gauge construction temp volt flame rating tinned copper stranding nom. 2 sizes 18 awg 16 awg. Why does mtw wire have a higher ampacity rating than standard stranded wire.

Where would i find ampacity tables for machine tool wire mtw other than in nfpa 79 1997. Is the higher ampacity determined by the physical characteristics or because the wiring is mostly run inside of control enclosures. Mtw wire is sold in 500 foot spools. Weighing approximately 951 lbs mft these wires are rated for up to 600 volts and have different maximum temperature ratings.

Mtw is ul rated for 600 volts.