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Cadet Electric Baseboard heater safely hard-wires for 1500-Watt at 240-Volt or 1125 Watt at 208-Volt Thermostat controls up to 5280-Watt at 240-Volt or 2640-Watt at 120-Volt Easily replaces most line voltage wall-mounted thermostats Double pole (4-wire) thermostat with positive off position 22 Amp thermostat

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  • thank you. I thought that was the thermostat I had to use, I haven't even purchased units yet. Is there a better route to take?
    – deborah
    Oct 24, 2021 at 7:46

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Absolutely not. The 18/5 thermostat wire is intended for low voltage, either millivolt or 24-volt AC thermostats intended for use with gas furnaces or heat pumps.

With line voltage heaters like the Cadet, you normally run full-power house wiring (12/2 or 10/2) from the circuit breaker to the thermostat. And then, more 12/2 or 10/2 from the thermostat to the heater(s).

There are other ways to do it, but if you want to use a 4-wire thermostat or a smart line voltage thermostat, that's how you have to do it.

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  • Wow, did you get that right instantly or not!? The OP could accomplish it two ways, either wire up a contactor, LV T-stat and transformer to power the T-stat, or get a line voltage t-stat that is programmable. They are not common, but available. Of course all of this would have to be properly housed and permanently accessible, which may be a practical challenge. Oct 24, 2021 at 6:29
  • @George yeah, I love my relays (I love 'em a lot more when they're at the panel and not in the bedroom, who wants to hear that?)... but I wanted to keep it simple. A branch to the thermostat would require at least /3 cable of the size of the mains feeds. Oct 24, 2021 at 6:46

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