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75-ft 8 / 3 / Romex SIMpull Stranded Indoor CU NM-B W/G Individual pack ( By-the-roll )

Southwire 75-ft 8 / 3 / Romex SIMpull Stranded Indoor CU NM-B W/G Individual pack ( By-the-roll )

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I need to run 8 ga 3 conductor wire in PVC conduit to a workshop in my back yard . What is the correct spec wire to use?


Hello, thank you for your question. This answer will require a more technical response. Please reach out to our technical team at cabletechsupport@southiwre.com for a detailed explanation of your question.

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You need 4 conductors to feed a subpanel. The NM-B cable where you posted your question cannot be used, NM-B cable can only be used in indoor dry locations and outside/underground conduit is classed by the NEC as a wet location. You could use 3 - #8 THHN/THWN-2 conductors with a #10 ground fed from a 40 or 50 amp 2-pole breaker, but I would recommend you use 3 - #6 THHN/THWN-2 conductors with a #10 ground fed from a 60 amp 2-pole breaker.

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