I have a half bathroom I was going to power with a dedicated 20 amp circuit breaker.
I was going to use the 20 amp breaker to power:
- vanity light
- shelf light (Phillips hue light strip)
- outlet
- bathroom fan
I was curious if this is frowned upon or even allowed? More specifically if using 12-2 to power my vanity light, and light strips is unsafe or “too much power”
I was under the impression 14-2 is typically used to power these sort of things so I was unsure what is preferable and safe.
Any help would be appreciated
Best Answer
You must use 12AWG with a 20A breaker for this run
Your "half-bath" is still a bathroom by the NEC's definition, as it has a toilet and a basin aka sink:
As a result, the fact you have a receptacle on this circuit makes it a bathroom branch circuit, which falls under NEC 210.11(C)(3) and the Exception thereto:
This requires the circuit to be a 20A circuit, run using 12AWG wire throughout. It's not at all rare or unusual, by the way, to have a single bathroom powered entirely by a dedicated 20A branch circuit as you describe, so don't worry about any silly notions of providing "too much power" to the lights.
The only things you'll need to know is that the bath fan needs to draw no more than 10A in order to comply with the 50% rule in NEC 210.23(A)(2):
Unless you have one of those fancy heated bath fans, you shouldn't have any problem meeting this rule, as an ordinary bath fan only draws a few amps.
Note that you'll need an AFCI for your 20A breaker, and will probably want to bring power to a two gang box at the vanity for the GFCI receptacle and lightswitch, with separate 12/2 runs going from there to the lights/fan. If you only have a single gang box installed, and can't change it, you can still do this, but you'll be stuck with a GFCI/switch combo, which means your fan and lights will be on the same switch, stopping you from having a timer for the fan.