I was originally planning on building my system for 240V since my only outlet is in my utility closet and I'm in an apartment. Now I've decided I'll be brewing on the balcony and was going to have a 25ft. cable run for my 120V system anyway.
I have a couple concerns that I wanted to ask this board. First, for the 240V outlet I'd have to do a cable run of something like 32-35ft. With a 10-4 SOOW cable rated for 30A, is this too long? A calculator I found online comes up with .035 ohms for 35ft of 10AWG wire. At 240V that's 20W. I don't really have a frame of reference for how bad that is.
My 2nd concern is GFI. My dryer outlet does not currently have GFI protection at the breaker. Since it's an apartment, I don't think getting one installed is an option. Could I put one inside my control box and still get the safety I need? Are there any other options or should I stick to 120V?