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Southwire 500 ft. 18 Solid TFN Building Wire

Southwire 500 ft. 18 Solid TFN Building Wire

Made in America

Support American manufacturers + independent hardware retailers in one purchase.

Designed for dependable indoor wiring, the Southwire 500 ft. 18 Solid TFN Building Wire combines a solid copper conductor with a rugged nylon jacket and PVC thermoplastic insulatio…

Southwire MPN 26977906
Sold Locally Only

This product isn’t sold on our website — see your local hardware store.

Typical Store Price i
Typical store price: low $0.99, average $0.39
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About Product Overview

Designed for dependable indoor wiring, the Southwire 500 ft. 18 Solid TFN Building Wire combines a solid copper conductor with a rugged nylon jacket and PVC thermoplastic insulation. This 18 AWG TFN (Thermoplastic Non-Metallic) conductor is built for everyday building applications where moisture may be present, delivering reliable performance in wet indoor locations.

Key specifications

  • Conductor: 18 AWG, solid copper
  • Cable Type: TFN (Thermoplastic Non-Metallic)
  • Insulation: PVC thermoplastic
  • Jacket: Nylon
  • Length: 500 ft
  • Color: Black
  • Voltage rating: 600 V
  • Temperature rating: 90°C
  • Amp rating: 6 A
  • UL Listed: Yes
  • Direct burial: No
  • Wet location use: Yes
  • Indoor use: Yes

Applications and benefits

  • Ideal for indoor branch wiring where a durable, moisture-tolerant conductor is required.
  • Solid 18 AWG copper provides stable conductivity and resistance to fatigue in fixed installations.
  • Nylon jacket delivers additional abrasion resistance and flexibility in conduit runs or tight spaces.
  • PVC thermoplastic insulation offers reliable electrical isolation while maintaining manageable flexibility for hand or machine pulling.
  • 500 ft length reduces the need for frequent splices on longer runs, improving project efficiency.
  • UL listed and rated for 600 V, making it suitable for standard building electrical systems that encounter damp indoor environments.

Installation considerations

  • Not intended for direct burial—use appropriate enclosure or conduit when routing this wire indoors.
  • Ensure wiring complies with local electrical codes and NEC guidelines for indoor, wet-location installations.
  • Pair with suitable conduit fittings and supports to maintain mechanical protection and code compliance.
  • When wiring in damp or wet indoor areas, verify that all terminations are properly rated and bonded per code requirements.

The Details Specifications

Brand Southwire
SKU 3707965
UPC 032886110009
Unit 0
Case Pack Quantity 4 per case
Retail Unit Quantity 500
Unit of Measure 500 RL
Dimensions (L × W × H) 4 × 7 × 7
Weight 4 lbs
Cubic Feet 0.10938 ft³
Country of Origin USA
Safety Data Sheet (SDS) Manufacturer documentation · opens in new tab

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