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Old 04-04-2010, 10:23 AM   #1
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wiring switch to gfci plug


Hi, I ran a new line (14/2 grnd) on a 15 amp circuit into the bathroom. I want the gfci plug (20 amp) and separate switch for the fan in the same box. There are 2 pairs of b&w wires in the box. What is the correct wiring expecting that the switch is downstream from the gfci - as always appreciate the step by step.
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Old 04-04-2010, 11:38 AM   #2
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wiring switch to gfci plug


U.S code requires the bathroom to be on a 20 amp circuit.
You also can not use 20 amp receptacles on a 15 amp circuit.
Rerun the correct wire.
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Old 04-04-2010, 12:02 PM   #3
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wiring switch to gfci plug


All the wiring including over to the fan and/or light must be 12 gauge in order to have the GFCI receptacle there.

Connect the incoming power black and white to the line side gold and silver screws (or line side black and white pigtails) respectively.

Connect the load side silver to the fan cable white

Connect the load side gold screw to the switch (cut a short length of black wire). Connect the fan cable black to the other terminal of the switch.

This way if you just step out of the shower all wet and flip the switch, you will be protected by the GFCI.

Now you can run a 12-2 cable to the box for the receptacle and leave the 14-2 there for the fan only but...
(1) The fan switch will not be GFCI protected,
(2) The box may be too small to accommodate all those wire ends.
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Last edited by AllanJ; 04-04-2010 at 12:09 PM.
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Old 04-05-2010, 07:28 PM   #4
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wiring switch to gfci plug


Appreciate the feedback and I hear what is being said. What was: 14/2 line was put in when the house was built in the late 70's and was used to connect the both bathrooms to the same 15 amp breaker. The breaker kept tripping because all the hair dryers and curling irons were being used often at the same time in both bathroons.

What I did: take off the dwnstairs (fan and plug) off the existing line and then ran a new line on a 15 amp circuit breaker into the this existing box, now I want to connect the new gfi (20 amp) and fan to that new line. Don't need the gfi to cover the fan, just need the power to from it.

Thanks for the patience in answers.
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Old 04-05-2010, 09:00 PM   #5
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wiring switch to gfci plug


When you took the downstairs fan and light off the existing line, you may not leave the live existing line hidden in the wall; that line has to enter a box with a cover exposed on teh wall.

To have the fan not covered by the GFCI, wire it this way.

Connect the feed black to the fan switch and also to the line side GFCI gold screw. You will need to cut some short lengths of black wire and wire nut these togehter so you will have enough wire ends to attach to the screws.

Connect the feed white to the fan cable white and also the GFCI line side silver screw. Again, extra short lengths of wire may be needed since two wires may not be attached to the same screw.
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Old 04-05-2010, 09:02 PM   #6
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wiring switch to gfci plug


When you took the downstairs fan and light off the existing line, you may not leave the live existing line hidden in the wall; that line has to enter a box with a cover exposed on teh wall.

To have the fan not covered by the GFCI, wire it this way.

Connect the feed black to the fan switch and also to the line side GFCI gold screw. You will need to cut some short lengths of black wire and wire nut these togehter so you will have enough wire ends to attach to the screws.

Connect the feed white to the fan cable white and also the GFCI line side silver screw. Again, extra short lengths of wire may be needed since two wires may not be attached to the same screw.

But I think it would be better to have the fan covered by the GFCI, see description a few replies higher up.
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