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Electrical outlet question

Discussion in 'Electrical Engineering' started by [email protected], Mar 25, 2013.

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  1. Guest

    I need to add a gfi outlet to my wifes bathroom. I want to add it to the current light switch box. This box currently has two switches, one for the fan,light and one for the vanity light. Each switch has a white wire, a blackwire, and a ground. When checking with a voltmeter, the white wire on bothswitches always has power. Each black wire only has power when the switch is turned on. I am assuming the white wire is the power wire. Can I take these white wires off the switches, connect them to the top and bottom "hot" terminal on the gfi outlet, then feed the switches from both terminals on the other side of the gfi? When I did this messing around with the switches,everything worked properly. I just thought that the black wire was always the constant power wire.
     
  2. Bill

    Bill Guest

    wire is the power wire. Can I take these white wires off the switches, connect them to the top and bottom "hot" terminal on the gfi outlet, then feed the switches from both terminals on the other side of the gfi? When I did this messing around with the switches, everything worked properly. I just thought that the black wire was always the constant power wire.

    If your switches are wired like the following, then you DO NOT have
    hot/neutral power at the switches and will need to run a new wire...
    http://www.make-my-own-house.com/images/elcodedblack.jpg

    If your switches are wired like this, then you have power and can add an
    outlet...
    http://www.buildmyowncabin.com/electrical/wiring-light-switch.gif


    If you do not understand the difference, hire an electrician.
     
  3. Guest

    Ok, in the first example, are you saying it is possible to power a gfci andfor it to work, just that the GFCI portion will not work on the outlet as intended?

    I appreciate it!
     
  4. Rich.

    Rich. Guest

    I need to add a gfi outlet to my wifes bathroom. I want to add it to the
    current light switch box. This box currently has two switches, one for the
    fan,light and one for the vanity light. Each switch has a white wire, a
    black wire, and a ground. When checking with a voltmeter, the white wire on
    both switches always has power. Each black wire only has power when the
    switch is turned on. I am assuming the white wire is the power wire. Can I
    take these white wires off the switches, connect them to the top and bottom
    "hot" terminal on the gfi outlet, then feed the switches from both terminals
    on the other side of the gfi? When I did this messing around with the
    switches, everything worked properly. I just thought that the black wire was
    always the constant power wire.


    First off the disclaimer: The newer code requirement is for GFI outlets in
    bathrooms to be 20-amp and also separate from the lighting circuit. So if
    you wish to do it the correct way, you have to run a 20-amp line from the
    panel.

    If you wish to do it the way you're intending, then some simple re-splicing
    is in order. First turn off the power, then take the white wire going to the
    fan switch and pigtail 3 black wires to it. Leave the existing black wires
    on each switch alone. Take the white wire off the switch for the vanity
    light. Connect one of the black pigtail wires to each switch, (leaving one
    for the moment.) Either up in the attic or behind the vanity light you're
    going to find the main splice for the bathroom wiring. In this splice you
    will have to take the white wire that ran to the vanity light switch off of
    the hot wire splice and splice it to the neutral wires. This leaves you with
    one black pigtail wire and one white neutral wire back at the switches. Once
    power is restored, these 2 wires will supply power to the GFI. I'm sure you
    can figure out that all of the grounds go together and to each device.
     
  5. bud--

    bud-- Guest

    Not likely there is a "main splice for the bathroom wiring".

    The wiring method that makes sense is a 2-wire romex from the vanity
    light and a 2-wire from the fan.

    The NEC requires all wires for a run be in the same cable or raceway.
    You can't get the hot from the fan and the neutral from the light.

    There is a duplicate question from a long thread in alt.home.repair
    which addresses the issues. The OP probably doesn't like the answers he
    is getting there.
     
  6. Doug Miller

    Doug Miller Guest

    wrote in
    This was answered, quite thoroughly, by myself and several others, in alt.home.repair when
    you posted it there.

    You CANNOT do this safely or legally because you DO NOT have a neutral in that box.
     
  7. Phoena

    Phoena Guest

    What the **** are you trying to do? Turn the lights off/on with the
    TEST/RESET buttons?
     
  8. Phoena

    Phoena Guest

    When i wanted a dedicated circuit for my microwave I got a long piece of
    red wire and a double circuit breaker. I ran the wire from the circuit
    breaker along the wall and held it there using Scotch tape. I wired it
    to the microwave oven and backstabbed the neutral from an existing
    outlet. I then loosened the screw that holds the wall plate to the
    outlet on the said outlet and wrapped the ground wire around it.

    They told me that what I did was a serious NEC code violation. I told
    the Nippon Electric Company they can come over here and kiss my fat ass.
     
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