Smoke detectors

Old 12-24-06, 01:44 PM
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Smoke detectors

Are they required by the NEC or some other regulatory document? Are they required to be hardwired or are battery operated acceptable?
Old 12-24-06, 01:55 PM
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Building codes tend to vary from area to area. Most areas require AC wired detectors in new construction. Some have battery back-up. These are much safer as many forget to change their batteries in the battery powered detectors. There are detectors that have 7-10 year lithium batteries. By the time the battery dies, it's best to replace the detector.

Last edited by twelvepole; 12-24-06 at 02:51 PM.
Old 12-24-06, 02:31 PM
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It is a building code issue, not an NEC issue. Check your local office for exact requirements.

For new construction and major renovations, most areas require one in each BR, outside each BR and on each habitable floor. One unit outside several BRs typically covers several requirements.
It is safe to say that most areas also require interconnected battery back up units.

Also CO detectors are becoming code required in may areas. Typically on floors with fuel burning appliances.

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