Wires in electrical box

Discussion in 'Electrical Forum discussion & Blog' started by toolguy504, Jul 29, 2009.

  1. toolguy504

    toolguy504 DIY Junior Member

    Messages:
    20
    Location:
    Chalmette, Louisiana
    Is it correct that you do not count the wires from the fixture (in this case a light) when calculating the size box needed. Thanks. Earl
  2. ActionDave

    ActionDave Electrician

    Messages:
    351
    Location:
    Colorado
    Fixture wires don't count. Devices-switches, recpts- do count.
  3. toolguy504

    toolguy504 DIY Junior Member

    Messages:
    20
    Location:
    Chalmette, Louisiana
    Thanks ActionDave. That is what I thought. Earl
  4. Thatguy

    Thatguy Homeowner

    Messages:
    1,459
    Location:
    MD
  5. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    26,825
    Location:
    Cave Creek, Arizona
    wires

    You mean the fixture wires do not take up any space. Anyway, here is the quote. Note the caveat about fixture wires.

    You can omit equipment-grounding conductors and up to four 16 AWG and smaller fixture wires from box fill calculations, if they enter the box from a domed luminaire or similar canopy (e.g., a ceiling paddle fan canopy) [314.16(B
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