baseboard heating install


Old 11-15-05, 09:43 AM
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Join Date: Jan 2005
Location: USA
Posts: 105
baseboard heating install

My house already has 2 baseboard heaters in the 2 upstairs bedrooms. They are connected to a 15 V circuit. I am adding 3 additional baseboards downstairs and was wondering what is the best way to do this. If each one of the baseboards are 400W, Am I calculating this right?

Leave the existing 2 baseboards on the 15 amp circuit. Run a new 15 amp circuit for the 3 new baseboards. (3 x 400 = 1200 amps total). 1200 amp / 120 volt = 10 Amp or 15 amp circuit.

Upgrade the existing circuit to 20 amp. Run all 5 baseboards on one 20 amp circuit. (5 x 400 = 2000)
2000 amp/ 120 volt = 16.6 Amp which is close to a 20 amp ..

am I calculating this right? Which option is preferred? Thanks.
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Old 11-15-05, 09:50 AM
Join Date: Sep 2000
Location: United States
Posts: 18,497
Everything you said is correct. Either will work, although your first approach sounds easier to do. You might also want to look into 240-volt heaters. You get twice the power on the same wires.

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