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Please note that due to Thanksgiving Holidays in the USA on the 23rd / 24th November, our delivery schedule will be disrupted this week.

The deadline for orders this week is 4pm on Tuesday 21st November.

Orders for goods that are not in stock in the UK, received after 4pm, will be shipped on 5th/6th December.

Electrical Hook-Up / Building Wire

Electrical Hook-Up / Building Wire


AutomationDirect offers three insulation types of electrical copper wire for industrial applications


  • MTW Machine Tool Wire - 10, 12, 14, 16, 18 AWG

  • TFFN Fixture Wire - 16, 18 AWG

  • THHN General Purpose Building Wire - 4, 6, 8, 10, 12, 14 AWG

  • Now in 500 ft. and 2,500 ft. spool and reel lengths


Electrical Wire Available from AutomationDirect


Type MTW Wire Overview
Type TFFN Wire Overview
Type THHN Wire Overview

Insulation Type - MTWInsulation Type - MTW

Type MTW conductors are primarily used in control cabinets, in machine tool applications and appliance wiring applications at temperatures -25°C to 90°C. MTW wire complies with the National Electrical Code (NEC) and NFPA Standard 79. Voltage rating for all applications 600 volts.
Insulation Type - TFFNInsulation Type - TFFN

Type TFFN (stranded) conductors are primarily used as hookup wire in conduit and trunking, as specified by the National Electrical Code (NEC), at temperatures not to exceed 90°C in dry locations. Voltage rating is 600 volts.
Insulation Type - THHNInsulation Type - THHN

Type THHN classified wire is intended for general purpose applications. It is appropriate for new construction and rewiring in 600 volt applications. Suitable for use in wet or dry locations at temperatures not to exceed 90°C or not to exceed 75°C in oil or coolants.
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