I added a bathroom fan switch and wiring to an existing bathroom switch to separate the bath fan from being controlled by that light switch. See my trick that makes patching the cut-out access holes easier.
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This bathroom fan switch wiring was done in a condominium with no access from above or below. I had to do some probing with an awl to confirm where the wood studs were.
I cut my access holes for the bathroom fan switch wiring using a compass saw at a forty-five-degree angle with the blade aimed inward. This method makes the repair much quicker and easier. You can use the same piece of drywall for repair.
I butter the edges of the hole in the wall and the edges of the cutout and push it back into place. I use a wide taping knife to smooth it out for the next coat after the first one dries.
The best part of this drywall repair method is that no taping is needed. Because of the angle and the buttering of the edges, there is no open space between the drywall and the cutout piece.
Some of the applicable National Electrical Code chapters for bathroom fan switch wiring are:
Article 210 Branch Circuits Not Over 1000 Volts ac, 1500 volts dc.
Article 250 Grounding and Bonding.
Article 300 General Requirements for Wiring Methods and Materials.
Article 334 Non-Metallic-Sheathed Cable Type NM and NMC.
See my article’s complete details and more photos of this bathroom switch wiring.
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