Wardwd,
I didn’t mean to come off so arrogantly. From your post I thought that you had no experience at house wiring and only needed to wire up the one heater. So why learn a whole trade for what an expert can do in a few hours time. Then you’ll have heat all the quicker.
Knowing that you have the desire to install it yourself and had past experience, it won’t be any more difficult than installing a light. First determine the circuit size required and where the connecting wires are located. Most likely a 15 Amp circuit that requires #14 wire. If the breaker box isn’t in “eye’s View” of the heater, a disconnect switch will be required at the heater. A simple 4x4 box mounted on the wall with a simple light switch will do.
Pick up a pre-wired section of sealtite at Home Cheapo, long enough to reach from the heater junction box to the disconnect switch that you mounted on the wall. In the heater junction box connect the black wire to black wire of the sealtight, the white to white with wire nuts. And screw the bare ground wire to the green grounding screw.
You will need to run wire from a dedicated breaker in the load center to the disconnect swutch. Keep in mind that the wires should not be exposed or on the surface. In the areas that you cannot run the romex behind the drywall, it will have to be placed in conduit, Steel EMT, plastic, flexible steel (greenfield), or sealtite. Connections in the wall mounted disconnect box: Black wire from the breaker to one pole of switch, the black wire from heater to the other pole. The two white wires are connected together with wire nuts. If the 4x4” wall mounted box is steel, that needs to be grounded together with the two bare wires with a wire nut. Some inspectors like to see the switch grounded also.
The thermostat wires are low voltage and can be run behind drywall or on the surface from the heater to where you mount the thermostat. Purchase thermostat wire from Home Cheapo, usually smaller gage (#20 or so) and 4 conductors. Also purchase a “heat only” thermostat. The instructions with it will tell you what color wire goes on each terminal.
Hopefully they local certified electrician on the board will lend a hand.
Good luck and please post some pictures of your garage
Clears the car by about 5 inches.
