You should see 4 types of wires in your
wall box. Here’s how to identify them.
Identify
wires
4
Line and load wires (black or red)
are connected to your existing switch.
Ground wire (exposed copper or green)
typically comes from the wall box.
Neutral wires (white)
typically come in a pair and are
fastened together by a wire nut.
Needed for installation.
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