240V baseboard heater - 12/2 or 10/2 ?
>>> a 240 volt heater uses more energy than a 120 volt heater
Using 240 instead of 120 volts allows the same set of wires to carry more energy.
The 12 gauge wires allow 16 amps for heating or other continuous loads. 16 amps at 240 volts is equal to 32 amps at 120 volts. For the latter you need two circuits wired 12 gauge or one circuit wired 8 gauge.
I would expect a 240 volt baseboard heater rated for X watts to give the same amount of heat as a 120 volt baseboard heater rated for X watts, assuming no significant voltage drop in the wiring.
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Last edited by AllanJ; 12-20-2008 at 11:56 AM.