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Split Receptacle Wiring

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To identify a split receptacle, they are usually rotated 180 degrees from the orientation of the other receptacles.

Diagrams shown on this page are simplified for clarity. Electrical outlet boxes can have numerous NM cables going in and out. See Actual Switch Box Wiring Diagram.

Receptacle ground connection diagram is shown separately.

Split Receptacle Wiring Diagram

Split Receptacle Wiring Diagram

In this diagram, a 2-wire NM cable supplies line voltage from the electrical panel to the split receptacle outlet box. The black wire (line) connects to half of the split receptacle (always hot) and two other NM cables.

A 2-wire NM cable connects from the split receptacle box to the switch box. The white wire (with black tape) carries line voltage to the switch. The black wire carries switched line from the switch back to the other half of the split receptacle (switched hot).

A 2-wire NM cable connects line and neutral from the split receptacle box to the other receptacles to the end of the chain.

Alternate Split Receptacle Wiring Diagram

Alternate Split Receptacle Wiring Diagram

In this diagram, a 2-wire NM cable supplies line from the electrical panel to the switch outlet box. The black wire (line) connects to a switch terminal and the black wire of a 3-wire NM cable that travels to the split receptacle box. The white wire (neutral) connects to the white wire of the 3-wire NM.

A 3-wire NM cable connects from the switch box to the split receptacle box. The black wire carries line to the “always hot” half of the split receptacle. The white wire carries neutral to the neutral pins of all of the receptacles in the chain. The red wire carries switched line to the switched half of the split receptacle.

A 2-wire NM cable connects line and neutral from the split receptacle box to the other receptacles to the end of the chain.