THHN/THWN-2 Copper Wire
THHN/THWN-2 Copper Wire
Take care of general purpose wiring in branch circuits, control circuits, machine tools, and appliances with THHN, the most commonly used building wire. THHN (thermoplastic high heat-resistant nylon) wire is available in a wider range of gauges and is more heat resistant.
THHN is a thermoplastic, high-heat resistant, nylon coated wire. THWN is essentially the same as THHN, but can withstand higher temperatures in both dry and wet conditions. THHN can only withstand temperatures of up to 75°C in wet conditions, while THWN can handle up to 90°C. In most cases, these wires can be used interchangeably in general purpose wiring in branch circuits, control circuits, machine tools, and appliances.
*Ampacity of conductors are based on the National Electrical Code (NFPA 70) Table 310.15(B)(16). See 110.14(C), 240.4(D) and 310.15(B) for other limitations where applicable
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.
1000 MCM THHN/THWN-2 Building Wire
GLOBAL Cable & Wire
Original price
$37.24
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Original price
$37.24
Original price
$37.24
$37.24
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$37.24
Current price
$37.24
Only 1 left!
Cut to length - sold by the foot. Enter the desired footage in the QTY box. Minimum 10' to maximum 1000'. Please call for longer put ups. Color:Bl...
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Original price
$37.24
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Original price
$37.24
Original price
$37.24
$37.24
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$37.24
Current price
$37.24
750 MCM THHN/THWN-2 Building Wire
GLOBAL Cable & Wire
Original price
$28.60
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Original price
$28.60
Original price
$28.60
$28.60
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$28.60
Current price
$28.60
Only 1 left!
Cut to length - sold by the foot. Enter the desired footage in the QTY box.Minimum 10' to maximum 1000'. Please call for longer put ups. Color:Blac...
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Original price
$28.60
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Original price
$28.60
Original price
$28.60
$28.60
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$28.60
Current price
$28.60
600 MCM THHN/THWN-2 Building Wire
GLOBAL Cable & Wire
Original price
$16.96
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Original price
$16.96
Original price
$16.96
$16.96
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$16.96
Current price
$16.96
Only 1 left!
Cut to length - sold by the foot. Enter the desired footage in the QTY box.Minimum 10' to maximum 1000'. Please call for longer put ups. Color:Blac...
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Original price
$16.96
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Original price
$16.96
Original price
$16.96
$16.96
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$16.96
Current price
$16.96
500 MCM THHN/THWN-2 Building Wire
GLOBAL Cable & Wire
Original price
$13.63
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Original price
$13.63
Original price
$13.63
$13.63
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$13.63
Current price
$13.63
Only 1 left!
Cut to length - sold by the foot. Enter the desired footage in the QTY box.Minimum 1' to maximum 1000'. Please call for longer put ups. Color:Black...
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Original price
$13.63
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Original price
$13.63
Original price
$13.63
$13.63
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$13.63
Current price
$13.63
400 MCM THHN/THWN-2 Building Wire
GLOBAL Cable & Wire
Original price
$10.97
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Original price
$10.97
Original price
$10.97
$10.97
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$10.97
Current price
$10.97
Only 1 left!
Cut to length - sold by the foot. Enter the desired footage in the QTY box.Minimum 1' to maximum 1000'. Please call for longer put ups. Color:Black...
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Original price
$10.97
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Original price
$10.97
Original price
$10.97
$10.97
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$10.97
Current price
$10.97
350 MCM THHN/THWN-2 Building Wire
GLOBAL Cable & Wire
Original price
$9.64
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Original price
$9.64
Original price
$9.64
$9.64
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$9.64
Current price
$9.64
Only 1 left!
Cut to length - sold by the foot. Enter the desired footage in the QTY box.Minimum 1' to maximum 1000'. Please call for longer put ups. Color:Varie...
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Original price
$9.64
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Original price
$9.64
Original price
$9.64
$9.64
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$9.64
Current price
$9.64
300 MCM THHN/THWN-2 Building Wire
GLOBAL Cable & Wire
Original price
$8.25
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Original price
$8.25
Original price
$8.25
$8.25
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$8.25
Current price
$8.25
Only 1 left!
Cut to length - sold by the foot. Enter the desired footage in the QTY box.Minimum 1' to maximum 1000'. Please call for longer put ups. Color:Black...
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Original price
$8.25
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Original price
$8.25
Original price
$8.25
$8.25
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$8.25
Current price
$8.25
250 MCM THHN/THWN-2 Building Wire
GLOBAL Cable & Wire
Original price
$6.85
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Original price
$6.85
Original price
$6.85
$6.85
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$6.85
Current price
$6.85
Only 1 left!
Cut to length - sold by the foot. Enter the desired footage in the QTY box.Minimum 1' to maximum 1000'. Please call for longer put ups. Color:Black...
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Original price
$6.85
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Original price
$6.85
Original price
$6.85
$6.85
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$6.85
Current price
$6.85
2/0 THHN/THWN-2 Building Wire – Cut to Length
GLOBAL Cable & Wire
Original price
$3.72
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Original price
$3.72
Original price
$3.72
$3.72
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$3.72
Current price
$3.72
Only 1 left!
Cut to length - sold by the foot. Enter the desired footage in the QTY box.Minimum 1' to maximum 1000'. Please call for longer put ups. Application...
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Original price
$3.72
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Original price
$3.72
Original price
$3.72
$3.72
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$3.72
Current price
$3.72
3/0 AWG THHN/THWN-2 Copper Building Wire
GLOBAL Cable & Wire
Original price
$0.00
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Original price
$0.00
Original price
$0.00
$0.00
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$0.00
Current price
$0.00
Only 1 left!
Cut to length - sold by the foot. Enter the desired footage in the QTY box.Minimum 1' to maximum 5000'. Please call for longer put ups. Application...
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Original price
$0.00
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Original price
$0.00
Original price
$0.00
$0.00
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$0.00
Current price
$0.00
4/0 THHN/THWN-2 Building Wire – Cut to Length
GLOBAL Cable & Wire
Original price
$5.92
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Original price
$5.92
Original price
$5.92
$5.92
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$5.92
Current price
$5.92
Only 1 left!
Cut to length - sold by the foot. Enter the desired footage in the QTY box.Minimum 1' to maximum 2000'. Please call for longer put ups. Application...
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Original price
$5.92
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Original price
$5.92
Original price
$5.92
$5.92
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$5.92
Current price
$5.92
1/0 AWG THHN/THWN-2 Copper Building Wire
GLOBAL Cable & Wire
Original price
$3.03
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Original price
$3.03
Original price
$3.03
$3.03
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$3.03
Current price
$3.03
Only 1 left!
#1/0 THHN/THWN-2 Wire Cut to length - sold by the foot. Enter the desired footage in the QTY box.Minimum 1' to maximum 7500'. Please call for longe...
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Original price
$3.03
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Original price
$3.03
Original price
$3.03
$3.03
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$3.03
Current price
$3.03
1 AWG THHN/THWN-2 Wire (By-the-foot)
GLOBAL Cable & Wire
Original price
$2.46
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Original price
$2.46
Original price
$2.46
$2.46
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$2.46
Current price
$2.46
Only 1 left!
#1 THHN/THWN-2 Wire Cut to length - sold by the foot. Enter the desired footage in the QTY box.Minimum 1' to maximum 5000'. Please call for longer ...
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Original price
$2.46
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Original price
$2.46
Original price
$2.46
$2.46
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$2.46
Current price
$2.46
2 AWG THHN/THWN-2 Building Wire – Cut to Length
GLOBAL Cable & Wire
Original price
$2.23
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Original price
$2.23
Original price
$2.23
$2.23
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$2.23
Current price
$2.23
Only 1 left!
#2 Stranded Copper THHN/THWN-2 Wire Cut to length - sold by the foot. Minimum 1' to maximum 10000'. Please call for longer put ups. Applications:Ty...
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Original price
$2.23
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$2.23
Original price
$2.23
$2.23
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$2.23
Current price
$2.23
3 AWG THHN/THWN-2 Wire (By-the-foot)
GLOBAL Cable & Wire
Original price
$1.77
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Original price
$1.77
Original price
$1.77
$1.77
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$1.77
Current price
$1.77
Only 1 left!
#3 THHN/THWN-2 Wire Cut to length - sold by the foot. Enter the desired footage in the QTY box. Minimum 1' to maximum 5000'. Please call for longer...
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Original price
$1.77
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Original price
$1.77
Original price
$1.77
$1.77
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$1.77
Current price
$1.77
4 AWG THHN/THWN-2 Wire (By-the-foot)
GLOBAL Cable & Wire
Original price
$1.41
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Original price
$1.41
Original price
$1.41
$1.41
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$1.41
Current price
$1.41
Only 1 left!
#4 THHN/THWN-2 Wire Cut to length - sold by the foot. Enter the desired footage in the QTY box.Minimum 1' to maximum 10,000'. Please call for...
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Original price
$1.41
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Original price
$1.41
Original price
$1.41
$1.41
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$1.41
Current price
$1.41
6 AWG THHN/THWN-2 Copper Building Wire
GLOBAL Cable & Wire
Original price
$0.92
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Original price
$0.92
Original price
$0.92
$0.92
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$0.92
Current price
$0.92
Only 1 left!
#6 THHN/THWN-2 Wire Cut to length - sold by the foot. Enter the desired footage in the QTY box.Minimum 1' to maximum 2000'. Please call for longer ...
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Original price
$0.92
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Original price
$0.92
Original price
$0.92
$0.92
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$0.92
Current price
$0.92
8 AWG THHN/THWN-2 Copper Building Wire
GLOBAL Cable & Wire
Original price
$0.60
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Original price
$0.60
Original price
$0.60
$0.60
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$0.60
Current price
$0.60
Only 1 left!
#8 THHN/THWN-2 Wire Cut to length - sold by the foot. Enter the desired footage in the QTY box.Minimum 1' to maximum 2500'. Please call for l...
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Original price
$0.60
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Original price
$0.60
Original price
$0.60
$0.60
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$0.60
Current price
$0.60
10 AWG THHN/THWN-2 Stranded Wire - sold by the spool
GLOBAL Cable & Wire
Original price
$165.00
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Original price
$845.00
Original price
$165.00
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$845.00
$165.00
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$845.00
Current price
$165.00
Only 1 left!
THHN Stranded Building Wire. 500 ft, 1000 ft or 2500 ft Spools. To purchase a 100ft or 200ft coil, click here. Applications:Type THHN/THWN-2 build...
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Original price
$165.00
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Original price
$845.00
Original price
$165.00
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$845.00
$165.00
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$845.00
Current price
$165.00
10 AWG THHN Stranded Wire
GLOBAL Cable & Wire
Original price
$0.33
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Original price
$0.33
Original price
$0.33
$0.33
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$0.33
Current price
$0.33
Only 1 left!
Cut to length - sold by the foot. Enter the desired footage in the QTY box.Minimum 100' to maximum 1000'. Please call for longer put ups. Color:Var...
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Original price
$0.33
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Original price
$0.33
Original price
$0.33
$0.33
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$0.33
Current price
$0.33
12 AWG THHN/THWN-2 Stranded Wire - sold by the spool
GLOBAL Cable & Wire
Original price
$23.00
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Original price
$509.00
Original price
$23.00
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$509.00
$23.00
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$509.00
Current price
$23.00
Only 1 left!
#12 THHN/THWN-2 Wire Sold by the spool – wide range of spool lengths available. Applications:Type THHN/THWN-2 building wire is intended for general...
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Original price
$23.00
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Original price
$509.00
Original price
$23.00
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$509.00
$23.00
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$509.00
Current price
$23.00
14 AWG THHN/THWN-2 Stranded Building Wire - sold by the spool
GLOBAL Cable & Wire
Original price
$67.00
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Original price
$353.00
Original price
$67.00
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$353.00
$67.00
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$353.00
Current price
$67.00
Only 1 left!
14 Gauge THHN Stranded Copper Building Wire. Sold by the spool. Applications:Type THHN/THWN-2 building wire is intended for general purpose applica...
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Original price
$67.00
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Original price
$353.00
Original price
$67.00
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$353.00
$67.00
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$353.00
Current price
$67.00
10 AWG THHN/THWN-2 Solid Building Wire - sold by the spool
GLOBAL Cable & Wire
Original price
$36.00
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Original price
$735.00
Original price
$36.00
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$735.00
$36.00
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$735.00
Current price
$36.00
Only 1 left!
10 Gauge THHN Solid Copper Building Wire. Sold by the spool. Applications: Type THHN/THWN-2 building wire is intended for general purpose applicati...
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Original price
$36.00
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Original price
$735.00
Original price
$36.00
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$735.00
$36.00
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$735.00
Current price
$36.00
12 AWG THHN/THWN-2 Solid Building Wire - sold by the spool
GLOBAL Cable & Wire
Original price
$22.00
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Original price
$550.00
Original price
$22.00
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$550.00
$22.00
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$550.00
Current price
$22.00
Only 1 left!
12 Gauge THHN Solid Copper Building Wire. Sold by the spool. Applications: Type THHN/THWN-2 building wire is intended for general purpose applicati...
View full details
Original price
$22.00
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Original price
$550.00
Original price
$22.00
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$550.00
$22.00
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$550.00
Current price
$22.00