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Wiring Solutions > Electrical Hook-Up / Building Wire > Insulation Type - THHN

Insulation Type - THHN

Type THHN wire is intended for general purpose applications such as conduit or cable tray, services, feeders, and branch circuits. It is appropriate for new construction or rewiring for 600V applications. These conductors are suitable for wet or dry locations at temperatures not to exceed 90 degrees Celsius (or 75 degrees C in oil or coolants).

Insulation Type - MTW

Insulation Type - TFFN

Insulation Type - THHN

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Wire - Insulation Type THHN

General Purpose Applications

Type THHN building wire is intended for general purpose applications as defined by the National Electrical Code (NEC). It is appropriate for new construction or rewiring for 600 volt applications. When used as type THHN, the conductor is 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. When used as type MTW, the conductor is suitable for use in dry locations at 90�C, or not to exceed 60�C in wet locations or where exposed to oils or coolants.

Sizes - 4, 6, 8, 10, 12, 14 AWG
Spool / Reel Length - 500 ft. & 2,500 ft.
Conductors - stranded, uncoated copper conductors per ASTM-B3, ASTM-B787 and ASTM-B8
Insulation - Color-coded, Polyvinyl Chloride (PVC) heatand moisture-resistant, flame-retardant compound per UL 1063 and UL 83
Jacket -
- THHN: tough, polyamide, Nylon outer covering per UL 1063 and UL 83
- Slick Nylon outer jacket for easy pulling
THHN Colors - 500 ft.:

14 AWG - Black, White, Red, Blue, Green, Yellow, Orange, Brown, Purple, Gray, Blue/White, Green/Yellow
12 AWG - Black, White, Red, Blue, Green, Yellow, Orange, Brown, Gray, Green/Yellow
10 AWG - Black, White, Green, Yellow, Orange, Brown, Green/Yellow
8 AWG - Black, Green, Green/Yellow
6 AWG - Black
4 AWG - Black