HouseChalk
Neutral wire
A neutral wire is the white wire in a switch box that completes the circuit and provides constant low-level power to smart switches and dimmers.
Why it matters
Most smart switches require a neutral wire to stay powered and connected to Wi-Fi. Older homes often lack neutral wires at switch locations.
Where people get this wrong
A neutral wire is not a ground wire. The ground wire is for safety. The neutral wire completes the electrical circuit and carries current back.
Real-world example
You buy a smart dimmer switch. The box says it needs a neutral wire. You check the switch box and find a bundle of white wires in the back — you have neutral wires available.
Where this hits your build
This matters during rough-in and before drywall. Once walls close, adding or moving wiring becomes expensive. Plan ahead.
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