Heat Pumps and Electric Heating - Dual-pole v single-pole thermostat

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mchrist
07-26-07, 08:57 AM
I understand, I believe, how dual-pole thermostats differ from single-pole thermostats. For single-pole, the thermostat interupts one leg of a 240V line, while the other leg remains live. But if the heater is off, will the heater continue to draw current through this "live" leg?

Hope this is clear enough?

Thanks.

airman.1994
07-26-07, 11:13 AM
Line voltage????
furd
07-26-07, 10:52 PM
While a two-pole thermostat is preferable for line-voltage control of 240 volt electric heaters a single-pole thermostat does indeed cut off the electric flow through the circuit. There will be no current flow through the unswitched line when the switched line is open.

mchrist
07-28-07, 07:28 PM
Thank you for your response!