I just bought a 60 gal Husky compressor and just wanted to make sure I was on the right track with the electrical install.
It's a 240 volt (compressor says 15amp and manual says 20amp) and did not come with a cord. From what I've researched I'm thinking the following: dedicated 240v circuit using a double pole 20 amp breaker. Running 12/2 Romeo from box through basement to garage wall. Then hook into a junction box on the garage side of the wall. Run the 12/2 through aluminum conduit to a safety on/off switch. Then from there through a flexible conduit to the compressor.
I guess my main concerns are:
1) Does this seem correct overall?
2) Can I use the 12/2 and the 20amp double pole breaker?
3) Do I have to use aluminum conduit or can I use the plastic?
4) On the safety switch does it have to be a 20 amp 240volt or can I use a 30amp 240 volt? Does it have to be the same size as the breaker I'm using in the main box?
1. Overall, your plan is OK
2. 12-2 w ground, 20 amp breaker is correct
3. I like EMT (thinwall) conduit in a garage. PVC looks kind of cheap.
4. Safety switch does not need to be same size; it can be rated higher. 30 amp models are about the easiest to find and cheapest to buy (assuming less than 30 amp load). Fuses not needed here either, only disconnecting means.
Since you have a conflict in the paperwork, look at the motor nameplate for the full load current. Don't count on the instructions. As long as the motor load is around 17 amps or less, your 20 amp plan should be a go.