Hi, my first post here. I just bought a used Lennox gas furnace for my workshop. The electrical cable was just cllipped off, leaving 6 inches of cable coming out of a fused on/off switch. It appears to be 12-3 with ground. There's red,black, white and ground. I would expect this is 220, with the red and black both being hot, but I'm not comfortable wiring it this way until I get some advice. Am I making the correct assumption? The sticker inside the furnace says its 110, single phase.
What's up? Thanks,
Ron