i think so, it does not identify on the wall itself but looking at the diagram inside the cap, whateever two wires from one of the wall holes that are connected to two RED wires must be the LINE...(if you look at the pic above with the old thermostat cover)
If i had a voltmeter I'd rather measure:
between two LINE wires, there should be a voltage difference and between two LOAD wires there is none?
There is no other way around it.
If i had a voltmeter I'd rather measure:
between two LINE wires, there should be a voltage difference and between two LOAD wires there is none?
There is no other way around it.