8. Remove the old connector
Unscrew the wire nuts to detach the 120V
connector from your old smoke alarm.
The exposed wire should be straight.
3/8 in (1 cm)
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9. Attach the Nest connector
Hold the white wire ends together, cap them
with a wire nut and twist clockwise until it's
secure. Do the same with the black wires.
There's no need for the red/orange/yellow
wire. Simply cap it with a wire nut and twist
until secure.
Black:
Bare copper
Power line
White:
Red/orange/yellow:
Neutral line
Interconnect
10. Install the Nest backplate
Screw the Nest backplate to the existing
electrical box, reusing the existing screws.
You can also screw the backplate directly
into the wall or ceiling with the Nest screws.
Tip: All smoke alarms prefer to live in a dust free area,
so remove any dust before you install Nest Protect.
11. Connect power
Plug the 120V connector into the back of
your Nest Protect.
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