Question from Mike, an Electrician from Patchogue, New York:
Can the carbon monoxide alarm be connected to the smoke detectors in series and be the last on the line? I haven’t been on the job for a few years and I just want to make sure that is how it is done again. I know the smoke detectors are in series, but I forget if the carbon monoxide can be connected to it as well.
Many local areas require permanently installed carbon monoxide detectors with battery backup which are used to detect odorless gas which could be fatal. Check with your local building jurisdiction for the specific requirements, and if combining the circuit wiring of carbon monoxide detectors and smoke detectors is permitted. Citation Reference: NEC NFPA 72 Article Section 29.5
Question from Mike, a Homeowner from Twin Falls, Idaho:
I want to install smoke alarms. Can I use 14/3 wire or do I have to use 12/3?
Smoke alarms may be wired from a circuit using 14/3 wire.
Electrical Wiring Tips for Home Electrical Wiring Projects
Tripping Circuit Breaker, Outlet at a Wall Switch, Light Fixture without a Ground Wire, Help with Home Electrical Wiring Projects.
See more House Wiring Videos from Ask The Electrician:
Electrical Project Skill Level:
Beginner to Intermediate.
Electrical Tools Required:
Basic Electricians Pouch of Hand Tools, Non-Metal Step Ladder, and a Voltage Tester.
Depends on personal level of experience, ability to work with tools for install smoke detectors, and the available access to the project area. Electrical Safety:
Identify the electrical circuit, turn it OFF and Tag it with a Note before working with the wiring.
Electrical Wiring Parts and Materials:
Electrical parts and materials for smoke detector wiring projects should be approved for the specific project and compliant with local and national electrical codes.
Electrical Codes and Inspections:
Installing additional electrical wiring for smoke detectors should be done according to local and national electrical codes with a permit and be inspected.
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