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Building wire for conduit, panels and fixtures: 14 AWG stranded THHN/THWN-2 and 16 AWG stranded TFFN/TFN, both 600V copper with a nylon jacket, sold in 100 ft rolls.

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In Stock
Spool of 16 GA TFFN building wire. White with black striping, 100ft
16GA Stranded TFFN Wire, 100ft

SKU: TFFN16WHT-C

$23.50 per piece
In Stock
Spool of 14GA THHN wire, black with white striping. 100ft coil
14GA Stranded THHN Wire, 100ft

SKU: THHN14BLK-C

$29.99 per piece

THHN vs TFFN

14 AWG THHN/THWN-216 AWG TFFN/TFN
UseBranch circuits and control wiring in conduit, duct or racewayFixture wiring and control panels
Rating600V; 90°C dry and wet (THWN-2)600V; 90°C
ConductorStranded copper (19 strands)Stranded copper (26 strands)
Outside diameter0.112"0.104"
StandardsUL 83, UL 1063, UL 758, CSA C22.2 No. 75UL 66, UL 1063, UL 758
ColorsBlack; black with white stripeWhite; white with black stripe
Shop14 AWG THHN16 AWG TFFN

For 12V and 24V vehicle, trailer and boat circuits, use GPT automotive primary wire instead.

FAQ

Is THHN the same as THWN-2?

This wire carries both ratings: THHN for dry locations and THWN-2 for wet locations, both at 90°C.

Can I use THHN outside conduit?

THHN/THWN-2 is rated for use in conduit, duct or recognized raceways. Follow the electrical code that applies to your installation.