TW/THW Wire

TW/THW Wire

Building Wire

This single-conductor cable is commonly used in general purpose wiring circuits, as machine tool wiring, and for internal wiring in appliances. Other applications include refrigeration wiring, air conditioning equipment, service entrances, and some motor types.

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600 V Maximum Voltage

KrisTech’s TW/THW wire is typically used for general purpose wiring applications, including circuits, machine tool control wiring, and internal appliance wiring. Other common uses include control panels, refrigeration equipment wiring, air conditioning equipment, automatic washers, and other machines.

Solid TW/THW is also used in general purpose grounding, such as CATV installations, swimming pool pumps and lighting, telephone and communications, and traffic light signals.

This wire is rated for 600 V and safely operates in dry locations up to 90°C (ampacity is limited to a conductor temperature of 75°C, per NFPA 70). In wet locations or areas where the wire is exposed to oil or coolant, it can safely operate in temperatures up to 60°C.

Our TW/THW wire has a Canadian Standards Association (CSA) Type TEW rating, permitting its use in dry locations up to 105°C, or wet locations or other applicable locations when exposed to oil or coolant at temperatures up to 60°C. Our standard circuit size (#10, 12, 14 AWG) products are marked Style 1015.

Additionally, our TW/THW wire is CSA-listed AWM-IA (Class I Group A), and TEW products are 600 V FT-1 rated. All our standard products are compliant and multi-listed as types TW, THW, MTW, TEW, and the applicable AWM.

Standard Products

  • Sizes #14 AWG through 500 MCM available
  • Solid or stranded conductor configurations
  • Standard insulation is a soft, flexible PVC

Custom Options

  • Tinned wire available for all sizes
  • Highly Flexible Class Stranding

KrisTech’s TW/THW wire meets the following standards and tests, including:

  • ASTM B-1, B-3, B-8, B-33, and B-173
  • UL 1685
  • NFPA 70/NEC 310
  • CSA C22.2 NO. 75

  • Conductors – Single conductors are available in solid or stranded, annealed, tin coated or uncoated copper configurations.
  • Insulation – Conductors are insulated with a concentrically applied PVC (polyvinyl chloride).

Print legends on the wire include the manufacturer, conductor size, voltage rating, UL symbol (if applicable) and type designation. Standard length spools are 500 or 2,500 feet.

Print Legend – KRISTECH WIRE CO. #XX AWG TYPE TW OR THW 75C 600V (UL)

Wire Paralleling and Cabling

Multiple wire runs on one reel

Colors

Choose from 12 insulation colors

Wire Dyeing

Change the color of your conductor’s PVC insulation

Wire Striping

Add a parallel or twist stripe to any single-conductor insulated wire

Custom Print Legend

Both standard and custom print legends available

Custom Lengths

Cut and ship any length coils or reels

Packaging

Custom product labeling, shipment identification markers, and optional knock-out boxes

Labeling

Custom product identifiers available

Specifications

AWG Standard Number of Strands Insulation Thickness (Mils) Alternative Insulation Thickness (Mils) Nominal Overall Diameter (Inches) Approx. Shipping Weight (Lbs/1000') Ampacity @ 75°C*
14 1, 7 30 45 0.13 / 0.16 18 / 22 15
12 1, 7 30 45 0.15 / 0.18 27 / 31 20
10 1, 7 30 45 .018 / 0.21 40 / 45 30
8 1, 7 45 60 0.24 / 0.27 66 / 73 40
6 1, 7 60 - 0.30 107 55
4 7, 133 60 - 0.38 163 70
2 7, 133 60 - 0.45 246 95
1 19 80 - 0.49 316 110
1/0 19 80 - 0.53 390 125
2/0 19 80 - 0.58 481 145
3/0 19 80 - 0.63 593 165
4/0 19 80 - 0.69 739 195
250 MCM 37 95 - 0.77 884 215
300 MCM 37 95 - 0.82 1045 240
350 MCM 37 95 - 0.87 1213 260
400 MCM 37 95 - 0.95 1379 280
500 MCM 37 95 - 1.00 1725 320
* Ampacity is from NEC Article 310. Check with local codes authority for guidance with your application.

Don’t Let Delays Sideline Your Next Project

Stay on track and on budget with KrisTech. Our team is ready to help you find the wire you need without the long wait times.



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