12 THHN THWN-2 Stranded Copper Building Wire Online

12 THHN THWN-2 Stranded Copper Building Wire

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12 AWG THHN THWN-2 Stranded Copper Building Wire

Allowable Ampacity:

• 20 Amps for General Applications (60°C)

• 25 Amps in Wet Locations (75°C)

• 25 Amps in Dry Locations (90°C)

Description

12 AWG THHN/THWN-2 stranded copper wire is rated for THHN (thermoplastic high heat-resistant nylon, dry) and THWN-2 (wet) applications. The “W” indicates that the wire is water-resistant. It supports up to 600 volts and works at temperatures up to 90°C. The PVC jacket is flame-retardant and resistant to sunlight, moisture, and chemicals. This wire is commonly used for lighting, conduit systems, and control wiring. It comes in lengths of 25 ft, 50 ft, 100 ft, 250 ft, and 500 ft, as well as by the foot for custom lengths.

Applications for 12 AWG THHN Wire

12 AWG THHN wire is ideal for 20-amp circuits in:

• Residential Wiring: Lighting, outlets, and appliances on 20-amp circuits.

• Commercial Wiring: Powering light-duty equipment, offices, and small retail spaces.

• Lighting Systems: Suitable for both indoor and outdoor circuits.

• Conduit Installations: Specifically designed to fit in conduits for wet or dry environments.

• Low-Voltage Circuits: Control wiring, HVAC systems, and small motors (up to 600 volts).

• Outdoor Use (With Conduit): Approved for damp or exposed locations when installed in conduit.

• Branch Circuits: For safely distributing power from circuit breakers.

Also Known As

12 gauge copper wire, THHN #12 wire, 12 stranded copper building wire, 12 gauge stranded wire, 12 conduit wire, 12 nylon-insulated copper wire, 12 THHN wire, 12 THHN/THWN-2 wire, 12 thermoplastic high heat-resistant wire, 12 PVC-coated wire, 12 nylon-jacketed wire, 12 AWG THHN stranded wire by the foot, 12 AWG THHN stranded wire 500 ft, 12 annealed copper stranded wire.

Construction of THHN 12 Gauge Stranded Wire

• Conductor:
  Flexible annealed copper conductor as per ASTM B3 and ASTM B8.

• Insulation:
  Durable, flame-retardant PVC jacket that resists sunlight and is lead-free.

• Outer Jacket:
  A tough, abrasion-resistant nylon jacket.

Standards for THHN/THWN-2 12 AWG Wire

• ICEA S-73-532

• UL 1277 (Resistant to flame, moisture, and sunlight)

• UL 1581, UL 83, UL 1063, UL 758

• ASTM B3 and B8 conductor standards

• ANSI/NFPA 70 for Safe Electrical Design and Installation

• RoHS compliant

• Approved for NEC Class I and II systems and Division 2 hazardous locations

• Allowed for Exposed Run (ER) and complies with NEC regulations

• Complies with A-A59544 specifications for durability and safety

Specifications of 12 AWG THHN Wire

• Size (AWG): 12

• Weight per 1,000 ft: 25 lbs

• Outside Diameter: 0.140 inches

• Conductors: Annealed Soft Copper per ASTM B3 and ASTM B8

• Number of Strands: 19

• Insulation: PVC

• Insulation Thickness (mils): 15

• Nylon Thickness (mils): 4

• Jacket: PVC

Manufacturer Equivalents
AWC :	Black : THHN 12 19 0 White : THHN 12 19 9 Red : THHN 12 19 2 Blue : THHN 12 19 6 Green : THHN 12 19 5 Yellow : THHN 12 19 4 Brown : THHN 12 19 1 Orange : THHN 12 19 3 Violet : THHN 12 19 7 Gray : THHN 12 19 8 Green W/Yellow Stripe : THHN 12 19 5/4
Wire & Cable Your Way :	THN12
Omni Cable :	Black : M512ST-01 White : M512ST-02 Red : M512ST-03 Green : M512ST-04 Blue : M512ST-05 Gray : M512ST-06 Orange : M512ST-07 Yellow : M512ST-08 Purple : M512ST-09 Brown : M512ST-10 Pink : M512ST-11 Tan : M512ST-12
Southwire :	Black : 22964101 White : 22965806 Red : 22966601 Blue : 22967401 Green : 22968201 Yellow : 22969001 Orange : 22970801 Brown : 22971601 Gray : 22972401 Purple : 23212401 Tan : 32016801 Pink : 24250301

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Application:

• Type THHN or THWN-2* conductors are primarily used in conduit and cable trays for services, feeders, and branch circuits in commercial or industrial applications as specified in the National Electrical Code2.
• When used as Type THHN, conductor is suitable for use in dry locations at temperatures not to exceed 90°C.
• When used as Type THWN-2*, conductor is suitable for use in wet or dry locations at temperatures not to exceed 90°C or not to exceed 75°C when exposed to oil or coolant. 
• When used as Type MTW, conductor is suitable for use in wet locations or when exposed to oil or coolant at temperatures not to exceed 60°C or dry locations at temperatures not to exceed 90°C (with ampacity limited to that for 75°C conductor temperature per NFPA 79).
• Conductor temperatures not to exceed 105°C in dry locations when rated AWM and used as appliance wiring material. Voltage for all applications is 600 volts.

Stranded: THHN or THWN-2* or MTW (also AWM) meets or exceeds all applicable ASTM specifications

• UL Standard 83
• UL Standard 1063 (MTW)
• Federal Specification
• A-A-59544, and requirements of the National Electrical Code.Other part ID is HW001 75001.