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Old 04-22-2019, 12:14 PM   #1
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Bathroom Reno


Hi folks, doing a little renovation for my kids bathroom. Had a couple couple of electrical questions.

My current setup is two light switches in the bathroom. One controls the main vanity light. Other switch is to the bath fan.

I'd like to replace the 2 gang box with a 3 gang box and add an outlet.

I'd also like to add another single gang outlet down closer to the vanity surface area hopefully running a line off the vanity gang box. Attached is my current blacks and whites coming from the light switch and also the vanity.

I noticed the vanity only has the whites in use, the black is pulled back and not used. Thanks so much in advance for your time and help.

P.S. that new line run is for an eventual shower light that I will tie into the main light switch.
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Old 04-22-2019, 01:53 PM   #2
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Re: Bathroom Reno


You might be required to bring a dedicated 20 amp 12g circuit for outlets in the bathroom.
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Old 04-22-2019, 02:20 PM   #3
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Re: Bathroom Reno


That is correct, you are not allowed to have have lights and power on the same circuit.


What I am seeing does not make sense for what you have explained. There should be only a single conductor in the single box. And it looks as if you already have two circuits in that box. There are 4 paper wrapped conductors in that box. Have no idea what you mean by "only the white conductors are in use". That does not make a circuit.
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Old 04-22-2019, 02:28 PM   #4
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Re: Bathroom Reno


Receptacles and lights are allowed on the same circuit in a bathroom if the circuit is 20 amperes and the circuit serves only one bathroom.
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Old 04-22-2019, 04:07 PM   #5
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Re: Bathroom Reno


I go a step further. I never mix lighting and power on the same circuit. The NEC is a minimal requirement. It will come back to bite you later. Take the extra step now while it is easy.
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Old 04-22-2019, 04:20 PM   #6
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Re: Bathroom Reno


If he was going to run lights off a 20 amp he would have to change all the wires, so outlets only sounds better.
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Old 04-23-2019, 12:59 PM   #7
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Re: Bathroom Reno


I would avoid using the blue plastic boxes for a 3-gang install as there is a great deal of flexing of the box. You could add some blocking to support the box or buy one of the grey plastic or a metal box.

For the bath vent fan a DewStop fan control switch works wonderfully to provide for full removal of moist air without having issues with the fan coming on by itself at night as happens with the in the fan moisture sensors.
Also review the GFCI receptacle requirements for a bathroom as per the current code.
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Old 04-23-2019, 02:14 PM   #8
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Re: Bathroom Reno


Quote:
Originally Posted by HandyAndyInNC View Post
I go a step further. I never mix lighting and power on the same circuit. The NEC is a minimal requirement. It will come back to bite you later. Take the extra step now while it is easy.
Why do you always state your opinion as code? When challenged you back off and say NEC is minimum and you like to do better.

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Old 04-23-2019, 02:49 PM   #9
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Re: Bathroom Reno


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Receptacles and lights are allowed on the same circuit in a bathroom if the circuit is 20 amperes and the circuit serves only one bathroom.

Yes, that is true, but I don't recommend that. I always recommend lights be wired to a 15A circuit separate from the 20A circuit for the receptacle outlet.
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Old 04-23-2019, 04:30 PM   #10
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Re: Bathroom Reno


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Yes, that is true, but I don't recommend that. I always recommend lights be wired to a 15A circuit separate from the 20A circuit for the receptacle outlet.
I do it that way too. Does not mean the other method is incorrect. Your post indicated it is not code compliant.
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Old 04-23-2019, 06:26 PM   #11
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Re: Bathroom Reno


Quote:
Originally Posted by HandyAndyInNC View Post
I go a step further. I never mix lighting and power on the same circuit. The NEC is a minimal requirement. It will come back to bite you later. Take the extra step now while it is easy.
I once wired a bathroom with the ceiling vent/light on the same circuit as a GFI outlet. Every once in a while the vent would cause the GFI to trip. Probably due to condensation from long showers. Not good when the GFI puts you in the dark!
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Old 04-23-2019, 07:49 PM   #12
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Re: Bathroom Reno


Quote:
Originally Posted by HandyAndyInNC View Post
I go a step further. I never mix lighting and power on the same circuit. The NEC is a minimal requirement. It will come back to bite you later. Take the extra step now while it is easy.
The NEC is not a minimal requirement. It is a safety standard!
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Old 04-23-2019, 09:58 PM   #13
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Re: Bathroom Reno


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The NEC is not a minimal requirement. It is a safety standard!
Some NEC items are spot on, others are arbitrary and utterly stupid.

Matching wire gage with breaker rating = 100% spot on for safety

Breaker panels can't be mounted horizontal if even one switch would flip up to turn off = No safety value whatsoever and makes renovation/upgrades harder
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Old 04-24-2019, 06:03 AM   #14
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Re: Bathroom Reno


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I once wired a bathroom with the ceiling vent/light on the same circuit as a GFI outlet. Every once in a while the vent would cause the GFI to trip. Probably due to condensation from long showers. Not good when the GFI puts you in the dark!
The lights and fan can be wired on the same circuit as the GFCI receptacle but not protected by the GFCI. Just extend the line terminals for the light/fan.
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