How to Identify Wiring

Being able to identify wiring makes electrical repairs easier. Use these tips to easily pinpoint problems and connect wires to the correct terminals when making repairs.

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Photo 2 of 4

Photo 2 of 4When there's only one cable entering an outlet box, it means the outlet is the last fixture on the circuit.

- Service Panel
- End-of-Run Outlet
- Middle-of-Run Outlet
- Electrical Wires

End-of-Run Outlet (2 of 4)

When there's only one cable entering an outlet box, it means the outlet is the last fixture on the circuit. Power comes from the service panel along the black (hot) wire through other outlets, switches, and light fixtures on the circuit and begins its return to the source through the white (neutral) wire attached to this outlet. The black wire attaches to a brass terminal; the white wire, to a silver terminal.

Next Photo: Middle-of-Run Outlet