In sizing underground feeder wire to a detached garage/shop do I calculate voltage drop based on distance from the main service panel on back of house to the shop(175feet)? Or do I include the distance from the meter to the house main service panel(160feet) and the distance to the shop(175) to come up with a total distance of (335feet)?
I want to run power to a new building(24X32). I've trenched approx. 165ft from my main service panel(200amp) on back of the house to the shop. I am thinking of installing 100amp sub-panel in a one-person shop and run; air compressor, small heater, lights, table saw, welder. Thinking of running 2/0 Al MFH cable to sub-panel. The small house was built on sub-divided property, so the meter is actually 160 feet behind the house(main service panel) and the cable coming into the house I believe is 4/0. I am trying to determine cable size to run in my trench, in conduit, with these variables.