power source from smoke detector

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Old 07-22-13, 03:37 PM
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power source from smoke detector

I have a wired smoke detector. I see 3 wired (red, black, white, ground) romex is used for smoke detector circuit.

I connected a testing bulb to the black and white wire of smoke detector circuit and I see that the bulb is lighting up.

Does that mean I can use this as the power source for a ceiling fan? Will any building code be violated due to this?

Thanks for your response.
 
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Old 07-22-13, 04:18 PM
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Absolutely you may NOT. The circuit for the smoke detectors is a dedicated circuit. You'll have to find another source for the ceiling fan.

Mod Note: some areas require dedicated circuits for smoke alarms, but the NEC does not. Check with your local code officials.
 

Last edited by pcboss; 07-22-13 at 08:05 PM.
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Old 07-22-13, 05:21 PM
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What power do you have in the room now? Is there an existing ceiling outlet or you having to add one for your new fan?
 
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Old 07-22-13, 05:37 PM
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I have no ceiling light or ceiling outlet, all through wall outlet. If circuit for the smoke detectors cannot be used then I have to fish through switch on the wall which is a pain.

When I switch off upstairs button on circuit breaker panel, I see all upstairs power going away, including smoke detector circuit. Not sure how/why it is dedicated?
 
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Old 07-22-13, 05:44 PM
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Actually in a residential application.....the smoke detectors are on a lighting line so that you can't shut off the smoke detectors without being inconvenienced by the lights also being off.

Technically, in my opinion, the ceiling fan should not be added to a "lighting only" circuit.
 
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Old 07-22-13, 06:11 PM
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Not sure how/why it is dedicated
Supposed to be dedicated. When was your house built? Codes change, and currently you can't run anything off the smoke detector circuit.
 
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Old 07-22-13, 06:31 PM
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Technically, in my opinion, the ceiling fan should not be added to a "lighting only" circuit.
Interesting. Why not? I put them on those all the time.
 
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Old 07-22-13, 07:51 PM
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you mentioned "Supposed to be dedicated"
...is it a code per USA/OHIO residential code?

96 build condo.

Can you please mention some why part of it? Like what if fan goes bad or something, xxx might goes bad, resulting in yyy goes bad, that's why this code is followed.
 
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Old 07-22-13, 08:07 PM
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Please see the added note in post #2.
 
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Old 07-22-13, 09:30 PM
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If circuit for the smoke detectors cannot be used then I have to fish through switch on the wall which is a pain.
How are you planning to control the fan?
 
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