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    Jcollie's Avatar
    Jcollie Posts: 3, Reputation: 1
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    #1

    Oct 30, 2006, 02:38 PM
    Isn't UF for outdoors and THHN indoors? Also when you go to HomeDepot or Lowe's There big Hanging chart says "Outdoors use UF and with a 50 amp breaker use #8" ?

    Ok,
    Last question I hope. For my spa, Can I use THHN grade wire #6 copper(romex?)for outdoors if it is running through conduit ? And it is OK for a 50 amp breaker? Thanks
    Stratmando's Avatar
    Stratmando Posts: 11,188, Reputation: 508
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    #2

    May 19, 2007, 01:53 PM
    UF is Underground Feeder, like romex. I would use #6 for 50 amp breaker
    #8 for 40 amp
    #10 for 30 amp
    #12 for 20 amp
    #14 for 15 amps.
    THHN is usually single conductors
    I would Use 2 # 6's for the hots, 1 #8 for neutral, and #10 for ground, and in PVC
    Use breaker at main Panel recommended for Spa. Also Needs GFI Protecton near Spa.
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