Rat wrote:Wow! Lots of good info here, but I'm still not sure what I'm going to get hit for by the electrician. With the assessment only 3 weeks away, I guess I'll find out soon enough. I have a 200A Sylvania panel put in when we remodeled in the mid 1980s. The garage "220V" line breaker is 30A. I don't know what gauge wire is used, but at least conduit is already run to the garage. Is it likely the previous contractor used a gauge wire that can take 40A even though the breaker was 30A? Thinking about it now, I doubt that, since that contractor probably never touched that particular circuit as it was unused, unless he had to rewire it due to the breaker panel being moved a greater distance from the garage. Even then, maybe he just spliced in more wire, with the original wire staying as part of it. The original wire put in during the 1950s when the house was built is probably still there. I assume the electrician can use the same conduit (pulling out the old wire if necessary, since it is not used for the gas dryer we have), but I'm not sure whether that is harder than running another one through the attic. I think there's room on the panel for another circuit.
for a 30A circuit, the standard wire used would be "10 gauge". Don't assume the conduit will be reused, most won't be, because it may be undersized for the current "National Electric Code", since it was originaly sized for a 1950's NEC.
You can pretty much assume he's going to want to run his own conduit, and wire, and supply a circuit breaker for your panel. He has to warrant his work, he can't do that with existing wire/conduit.