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Thread: Greenhouse Wiring

  1. #1
    Join Date
    Oct 2008
    Posts
    1

    Greenhouse Wiring

    We're installing a new detached greenhouse. We want to bring both normal and emergency power from the nearby existing building. Is this allowed by the NEC.

  2. #2
    Join Date
    Feb 2003
    Location
    Seattle, WA
    Posts
    16,969
    Yes. Reference 225.30(A). But I think it is more likely to be appropriate to call this an "Optional Standby" system, rather than "emergency."

    Welcome to the forum.
    Charles E. Beck, P.E., Seattle
    Comments based on 2014 NEC unless otherwise noted.

  3. #3
    Join Date
    Feb 2003
    Location
    Massachusetts
    Posts
    48,432
    I agree with Charlie and will add that if you actually have 'emergency' circuits they will have to be kept separate. If the circuits are as Charlie said 'optional standby' then they can be mixed with the normal wiring.

  4. #4
    Join Date
    Sep 2008
    Posts
    386
    Make sure you include disconnects in the building for the circuits you bring over.

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