I am remodeling my bathroom, and as I began to tackle the electric work, I discovered a couple things that were concerning:
- The circuit that the bathroom (as well as adjacent bedroom and hallway) are on is controlled by a 20 amp breaker. It's actually 2 20amp single pole breakers in the same spot.
- The wiring that was in the bathroom, that I have since removed all the way back to where the wiring comes into the bathroom, was a mix of 12/2 and 14/2 wire. The wiring that comes into the room, and is the source of the electric for the room appears to be 14/2 (it's old wire with no ground wire and no labeling on sheath, but my wire strippers suggest it's 14/2).
Now I know you are supposed to use 12/2 on a 20 amp circuit, but I don't know the extent of what's on this circuit and what size wire is used throughout the length of this circuit. What should I do to remedy this? I still need to power the bathroom (a vent fan, vanity lights, GFCI). Can I simply switch the 20 amp breaker for 15amps at the box and then run 14/2 throughout rest of bathroom?