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Old 08-04-2010, 04:40 PM   #1
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infra red heat

building a bathroom and need extra head. would like to have a ceiling infrad red heat.
I do not know what else is on the circuit line but need info. as to how to find out if I need a seperate circuit. The infrad heat i am looking at is 250 to 375 watt. If you have detailed info in how to find out it would be great. My circuit box is on another floor and in a different area and one contractor told me it would be an extra $1500.00 because I need a seperate circuit. He didn't check anything at all just told me this. small bathroom. thanks
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Old 08-04-2010, 05:41 PM   #2
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Alrighty, you need extra heat in the bathroom

If you want to add the heat to an existing circuit it must be the circuit in the bathroom you add it to (for code reasons). Depending on whether your existing wiring is 14 guage or 12 guage you can support 1800 or 2400 watts respectively.

Your bathroom circuit by code should only be supplying power to outlets/fixtures in your bathroom, but in many older houses this is not the case. I'd start by systematically turning the breakers of your house on and off and find out exactly which outlets and lights each breaker controls.

If you do this and determine that one breaker controls all the fixtures in your bathroom (and possibly other fixtures elsewhere as well) then you need to determine how much electrical load that circuit already has. If you tell us what that circuit has on it then we can probably help you at that point.

Last edited by Troglodyte; 08-04-2010 at 05:58 PM.
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Old 08-04-2010, 08:42 PM   #3
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To be up to date code-wise --

At least one 20 amp circuit serving the receptacles and lights, etc. of just one bathroom and no other rooms,


At least one 20 amp circuit serving just the receptacles of two or more bathrooms and no other rooms.

A separate circuit is recommended for each bathroom since hair dryers going in two bathrooms could trip the breaker of a shared circuit.

Additional circuits may serve bathroom lights together with lights and receptacles in other rooms.

A 375 watt ceiling heat lamp could be wired into the circuit serving the bathroom lights, subject to the wattage of other lights and equipment on that circuit.

The receptacles need GFCI protection.
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Old 08-04-2010, 10:55 PM   #4
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Don't expect much heat from a 250W I have one outside each bath

I have them for just drying off, they're not that noticeable .
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