How to Wire Smoke Alarms

Written by patrick nelson
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How to Wire Smoke Alarms
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Smoke alarms can be installed either singularly or in an interconnected pattern. The interconnected pattern is better. It’s a bit more complicated, but has the advantage of sounding all the alarms in a home should one of the alarms detect smoke. Interconnected units should be wired to the same fuse or circuit breaker. The manufacturer will recommend a maximum total length of wire (see the instruction book) and a maximum total number of alarms that can be interconnected.

Skill level:
Easy

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Things you need

  • Wire nuts

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Instructions

  1. 1

    Connect the white wire on the power connector to the neutral wire in the junction box for both interconnected and stand-alone alarms.

  2. 2

    Connect the black wire on the power connector to the hot wire in the junction box for both interconnected and stand-alone alarms.

  3. 3

    Connect the orange wire on the power connector to the interconnect wire in the junction box for interconnected alarms. Repeat for each unit. Do not connect the orange wire to a hot or neutral wire. Ignore the orange wire if you are connecting a stand-alone alarm—just tuck it away.

Tips and warnings

  • Don’t connect interconnected wire smoke alarms across multiple dwellings—if a false alarm were to go off, all the households would experience the unwanted alarm.
  • Don’t cross hot and neutral wires between alarms.

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