I'm pretty inexperienced when it comes to electrical work, though I do know my way around a circuit diagram, thanks to some EE courses in college. I think this is one I can do myself, I just would like some validation that I understand the wiring correctly and that my plan is acceptable.
I have an outlet and single pole switch in one box next to the sink in my kitchen. The switch controls the top outlet, and has plugged into it a fluorescent light that is mounted above the sink. The bottom outlet is always hot, and I currently have my microwave plugged into it. I opened up the box to look at the wiring (with the breaker off, of course), here's a sketch of what it currently looks like inside:
One additional note on the setup - my fridge is connected to the same breaker as this outlet, and I'm 90% sure it's further down the line. I'd rather not put the fridge on the GFCI load, as I don't want my food to rot if it randomly trips while I'm out.
I want to protect the outlets next to the sink with GFCI, but I want to keep one of the sockets controlled by a switch, and I don't think I want to put the rest of the circuit on the GFCI load, because I don't want the fridge on GFCI.
- What's the simplest and/or best way to rewire to achieve this?
- I'm not sure which of the lines leading into the box comes from the breaker box - is there an easy way to test this?
- Is there an easy way to test for sure whether or not the fridge outlet is before or after the sink outlet?
I know I can get a GFCI/switch combo unit at Lowe's for ~$30. I'm thinking I could replace the switch with that, and wire the existing regular outlet to the load end of the GFCI (with the top outlet wired through the switch), but have the rest of the circuit wired to the line (i.e. not on the GFCI load). I think this does what I want, plus gives me a bonus GFCI-protected outlet by the sink.
Something like the first diagram in the answer to this question, actually, except with the top outlet connected in place of the garbage disposal, and the bottom outlet also connected to the load.
Does this sound reasonable?