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-   -   Baseboard Heaters (http://www.diychatroom.com/f18/baseboard-heaters-17237/)

matrix733 02-17-2008 09:52 PM

Baseboard Heaters
 
Is it code to run 4 or 3 500w (240v) baseboard heaters off one 22amp(two pole) rated thermostat on 12/3 romex?:huh:

Thanks

junkcollector 02-17-2008 09:59 PM

A 20 amp circuit will easily handle 4 heaters of this size. (4x500w=2000w/240v=8.3A) A 15 amp circuit will suffice. Why the 12/3? The heaters are straight 240, so you only need 2 hot wires plus ground. 12/2 will work just fine. Be sure to reidentify the white as a "hot'' conductor.

chris75 02-17-2008 10:13 PM

Quote:

Originally Posted by junkcollector (Post 98797)
A 20 amp circuit will easily handle 4 heaters of this size. (4x500w=2000w/240v=8.3A) A 15 amp circuit will suffice. Why the 12/3? The heaters are straight 240, so you only need 2 hot wires plus ground. 12/2 will work just fine. Be sure to reidentify the white as a "hot'' conductor.

Just a side note fixed electric heat must also be figured at 125%... so,
(4x500w=2000w*125%=2500w/240v=10.41A

matrix733 02-17-2008 11:48 PM

Thanks, I forgot that I did not need a neutral for the heaters.


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