I picked up a used house furnace to use in my garage. The previous owner had been using it in his garage, it just sat on the floor and pulled air in the side at out the top. I will probably mount it to the ceiling. I'm trying to find out what size wire I need to run to it.
It has four heating elements. One is broken and disconnected, and I'm going to disconnect one more. I will be left with two 4.8kw elements. There are two 60A breakers built into the furnace. I will only be using one breaker, the other one will be turned off and disconnected. The way I measure it, at 240v it will be drawing 40 amps, plus some for the blower. The wire run from the garage subpanel to the furnace will be about 20 feet. What size wire and breaker will I need in the subpanel for it?
Thanks for any help.
-Ryan