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Green solid TFFN building wire on spool, 18 AWG, 500 ft

SOUTHWIRE COMPANY

SOUTHWIRE COMPANY 26981106 TFFN Building Wire 18 AWG Green Solid 500 ft

SKU CH-QRGD-SVGMY

Solid 18 AWG copper building wire, 500 ft green TFFN on a spool, 600 V vinyl insulation, .08 in. outside diameter

  • Product typeWire & Cable
  • TFFN-rated 600 V insulation protects circuits
  • 18 AWG solid copper carries signal reliably
  • Green colour codes grounding conductors instantly
  • 500 ft spool reduces splice points on long runs
  • 08 in diameter fits tight conduit bends

18 AWG TFFN wire for conduit runs

This 18 AWG TFFN building wire uses a solid copper conductor with green vinyl insulation rated for 600 V. The 500 ft spool suits electricians and contractors pulling single-conductor circuits through conduit systems. Nominal outside diameter is .08 in for standard conduit fill calculations.

Solid conductor on spool for pulling

The solid conductor resists deformation when pushed through long or bent conduit runs. Green insulation identifies the conductor for grounding or specific circuit coding per electrical standards. Spool packaging keeps the wire tangle-free during installation and allows smooth pay-out from a reel stand.

600 V rating and conduit-only use

This TFFN wire is rated for 600 V maximum and intended for installation inside raceway or conduit. It is not rated for direct burial, exposed runs or wet locations without additional protection. Solid 18 AWG gauge limits ampacity, so it cannot serve high-current branch circuits requiring larger conductors.

How it compares

Measured against everything we stock in Electrical Conduit & Fittings, at today’s prices. Recalculated every night.

Price $50.99
Pricier than about 66% of the 1,290 comparable items (median $28.99).

Specifications

Product
Brand nameSOUTHWIRE
Product typeWire & Cable

Questions about this item

Does the 18 AWG solid copper conductor require periodic re-torquing or replacement after installation?

Solid 18 AWG copper conductors in TFFN wire do not require re-torquing; the wire is rated for continuous service at 600 V and is replaced only if insulation is damaged or the conductor is severed.

What is the first performance limit reached when the wire carries its rated load continuously?

The 600 V insulation rating and the ampacity of 18 AWG copper set the thermal limit; sustained current above the NEC ampacity for this gauge will cause insulation degradation before any other failure mode.

How much heat does the 500 ft spool generate when the circuit runs at full load all day?

Heat rise depends on the actual load current and conduit fill; at the 18 AWG ampacity the vinyl insulation operates within its 600 V temperature rating, and the 0.08 in outside diameter allows normal convection cooling.

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