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Old 09-28-2012, 01:07 AM   #16
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Electric Baseboard Heater Wiring Help


If you had a dead short the first time you wired it, the contacts inside the stat probably "welded" themselves together which is why it won't turn off when it reaches the temperature you have it set at. The single pole thermostats don't have an "off" position so you can't hold their contacts open like you can with a 2-pole stat. You just set them at their lowest setting and they won't turn the heat "on" unless the temperature drops below the minimum setting. Hope this helps.


Last edited by Koldhammer; 09-28-2012 at 01:17 AM.
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Old 09-28-2012, 03:06 AM   #17
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Electric Baseboard Heater Wiring Help


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Originally Posted by Protocol. View Post
That doesn't make any sense. Thermostat would have to switch off. If not it would then be a resistor wired in series (rheostat).
The normal operation of such thermostats require them to cycle the connected load on and off to maintain room temperature. But a single pole thermostat can not be turned "off" in the true sense of the word. You can turn it "down" to a low setting, but the potential is there for it to activate the unit on a cold day...

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I don't agree with having a single pole stat though. Double pole will be better IMHO as the unit won't be potentially live when the thermostat is open.
Double pole thermostats operate by switching one of the poles on and off when cycling the load to maintain temperature. The controlled unit is potentially live during normal operation, so don't be fooled. The other pole remains connected at all times. Same operation as a single pole stat.

The main difference here is there is a hard "off" position available that disconnects both lines when set to off. This acts as a disconnecting means. This is the only time when your unit is really "off"
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Old 09-28-2012, 06:32 AM   #18
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Electric Baseboard Heater Wiring Help


I feel more comfortable with a 2pole thermostat. What would be the proper wiring?
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Old 09-28-2012, 11:45 AM   #19
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Electric Baseboard Heater Wiring Help


You are confusing the issue with the terms OFF. It is being used for two different things in the various posts.

1. OFF #1 being the heater is not making heat. It is OFF but the one line is still live.
2. OFF #2 being the heater has NO power to it at all and is safe to work on. Which in this case it is not because the thermostat is being installed as a switch loop and there is still power in the junction box.
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Old 09-28-2012, 07:30 PM   #20
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Electric Baseboard Heater Wiring Help


Got new thermostat single pole.... Works great! Thank you for all your help

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