Products > Copper Building Wire > THHN/THWN-2

Wire & Cable To Go offers a wide selection of THHN Building Wire products at the best prices you'll find anywhere. THHN building wire is appropriate for use iin alternating current (AC) electrical distribution systems of almost every industrial, residential and commercial building, usually at voltage levels ranging from 110-600 volts. It is is generally used to carry electrical current to all external uses of power in a building or dwelling. THHN wire may also be used for wiring of machine tools, control circuits or on certain appliances.

When it comes to integrating THHN wire into your project, it is important to understand that THHN is UL listed with a rated 90 degrees Celsius in dry locations or 75 degrees Celsius in wet applications with a THWN rating. The majority of THHN wire carries a dual rating on the cable marked THHN / THWN for both the wet and dry temperature rating.

THHN Solid
THHN, Solid, Copper
Item (250ft or 2500ft spools) O.D.
(inches)
Ampacity
@ 90°C
Price
14 AWG THHN Solid, 500ft or 2500ft Spool » 0.101 15 $0.09/ft
12 AWG THHN Solid, 500ft or 2500ft Spool » 0.119 20 $0.11/ft
10 AWG THHN Solid, 500ft or 2500ft Spool » 0.161 30 $0.17/ft


THHN Stranded Wire
THHN, Stranded, Copper
Item (sold by the foot unless noted otherwise) O.D.
(inches)
Ampacity
@ 90°C
Price
14 AWG THHN, 500ft or 2500ft Spool » 0.109 15 $0.09/ft
12 AWG THHN, 500ft, 1000ft or 2500ft Spool » 0.128 20 $0.12/ft
12 AWG THHN 100ft or 200ft Coil » 0.128 20 $0.16/ft
10 AWG THHN, 500ft, 1000ft or 2500ft Spool » 0.161 30 $0.18/ft
10 AWG THHN, 100ft or 200ft Coil » 0.161 30 $0.23/ft
8 AWG THHN » 0.213 55 $0.31/ft
6 AWG THHN » 0.249 75 $0.50/ft
4 AWG THHN » 0.318 95 $0.78/ft
3 AWG THHN » 0.346 110 $0.98/ft
2 AWG THHN » 0.378 130 $1.20/ft
1 AWG THHN » 0.435 150 $1.55/ft
1/0 THHN » 0.474 170 $1.93/ft
2/0 THHN » 0.518 195 $2.42/ft
3/0 THHN » 0.568 225 $2.95/ft
4/0 THHN » 0.624 260 $3.84/ft
250 MCM THHN » 0.678 290 $4.58/ft
300 MCM THHN » 0.730 320 RFQ
350 MCM THHN » 0.777 350 RFQ
400 MCM THHN » 0.821 380 RFQ
500 MCM THHN » 0.902 430 RFQ
600 MCM THHN » 0.998 475 RFQ
750 MCM THHN » 1.126 535 RFQ
1000 MCM THHN » 1.275 615 RFQ
 

THHN wire Properties

The different letters in THHN wire denote particular properties of the cable:

T for Thermoplastic
HH for High Heat-Resistent, and
N for Nylon Coated .

For wire also rated as THWN: Thermoplastic Heat and Water Resistant Nylon Coated.

These characteristics make THHN wire an excellent choice for controlling outdoor factors that would otherwise alter the performance of wire cable. For end users, this means greater flexibility for applications like push-button stations, fire alarm controls, and temperature control systems.

Cost Effectiveness
THHN wire has grown in popularity since it is a cost effective alternative compared to other types of building wire. For indoor and outdoor applications where longevity is valued, THHN wire provides the peace of mind that contractors and homeowners demand. Because THHN wire is UL-approved for permanent installation, it is commonly used in new construction and a variety of other projects where the wire will not need to be removed.

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