How to wire thermostat for electric baseboard?

I have a 240 volt electric baseboard heater and trying to update my thermostat. Old thermostat has two wires, new thermostat has four wires, two of which are labeled load and other two labeled line. Could you explain how I wire the new one? What is difference between line and load? Thanks.How to wire thermostat for electric baseboard?If it's 240V., your heater has two 'phase` wires.

Your old thermostat only opened one of these

wires, interrupting the circuit, but leaving a live

wire connected to the heater.

After this fried a 'DIY`er or two, it was required

that the thermostat interrupt both 'legs` of the circuit.

If the thermostat is part of the unit, just wire both

incoming wires to the %26quot;line%26quot; side, and connect two

wires of equal size with 'hi temp` insulation, (THHN,

THHW), to the heater from the %26quot;load%26quot; side.How to wire thermostat for electric baseboard?Do you still have the instructions that came with the thermostat? The line is the live wire (feed) and the load is coming from the baseboard. You have to look at the instructions as the thermostat is nothing but a switch to turn the heater on and off automatically. I would guess that one of the load wires is for the heater and the other from one leg of the feed and one of the line sides feeds the heater and the other connects to the line side. It is being switched and the line feed has to open and closeHow to wire thermostat for electric baseboard?Your old thermostat closed the electrical circuit on one 'leg' of the 240V circuit. The other 'leg' must have been connected directly to the heater. With your new thermostat, connect one 'line' wire to the wire coming from the breaker/fuse panel; connect one 'load' wire to the wire going to the heater. Your other line and load wires will not be required but marrette them individually to prevent any hazardHow to wire thermostat for electric baseboard?The line wires are the 2 wires coming from your fusebox. The load wires are the 2 wires coming from the heater elements, so just hook up accordingly.How to wire thermostat for electric baseboard?You need to determine if the baseboard heater is controlled by line voltage (220V) or if there is a transformer stepping the voltage down.



If you determine this then you will know how to wire the stat. Most thermostats do not switch the line voltage (too dangerous).