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Wire & Cable

PV wire, THHN, and USE-2 by the foot or the reel — Cerro, Cobra, Titan, and Omni in stock.

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The Right Wire for the Run

PV wire (USE-2) is sunlight-resistant and rated for 600V to 2kV DC array runs; THHN-2 belongs inside conduit on the AC side. Undersized wire is the most common DIY failure — keep voltage drop under 2% on long runs, which often means stepping up one or two AWG sizes from the ampacity minimum. Copper for final terminations, aluminum for long service feeders where code allows, and always torque lugs to spec.

Pro Tips

  • PV wire and USE-2 outdoors and in arrays; THHN in conduit
  • Keep voltage drop under 2% on runs over 50 feet
  • 10 AWG PV wire is the solar industry workhorse

Wire & Cable — Delivered Nationwide

Wire and cable at PES Supply — 10 AWG PV wire, THHN-2, USE-2, service entrance, and communication cable from Cerro Wire, Cobra Wire & Cable, Titan, Omni Cable, and Service Wire. Cut-to-length and full reels for solar arrays, service panels, and generator installs with same-week shipping.

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