How to Wire a Switched Outlet: Half-Hot and Fully Switched Configurations

Wiring a switched outlet typically means configuring a standard duplex receptacle so that one half is controlled by a wall switch while the other half remains continuously powered (a "half-hot" or split receptacle). Alternatively, it can mean wiring an outlet so that the entire receptacle is controlled by a switch. For a standard 15-amp residential bedroom or living room circuit, you will use 14/2 or 14/3 NM-B cable, a 15A duplex receptacle, and a 15A single-pole switch. The defining mechanical step for a half-hot configuration is breaking the brass connecting tab on the hot side of the receptacle to isolate the top and bottom halves.

This guide provides the exact jobsite procedures, terminal mappings, and testing protocols required to wire both configurations safely and to National Electrical Code (NEC) standards.

Tools, Materials, and Device Specifications

Before pulling any wire, ensure your components match the circuit breaker rating. Never put a 20-amp receptacle on a 15-amp breaker, and never use 14 AWG wire on a 20-amp breaker.

Material Specifications:

• Cable (15A Circuit): 14/2 NM-B (fully switched) or 14/3 NM-B (half-hot split). 14 AWG copper, rated for 15 amps.
• Cable (20A Circuit): 12/2 NM-B or 12/3 NM-B. 12 AWG copper, rated for 20 amps.
• Receptacle: Leviton 5262 (15A, 125V) or Leviton 5362 (20A, 125V). Ensure it is a commercial/spec-grade device, not a builder-grade 50-cent unit, as spec-grade devices feature deeper terminal screws and robust brass contacts.
• Switch: Leviton 1451 (15A single-pole toggle) or Leviton 5657 (15A single-pole rocker).
• Electrical Box: Carlon B618R-UPC (single-gang, 18 cubic inches) or larger. Pro-Tip: When wiring a half-hot outlet, the extra wires from a 14/3 cable increase box fill. Use a 20.5 or 22.5 cubic inch deep box to avoid cramming, which can damage wire insulation and violate NEC Article 314 box fill calculations.

Wire and Terminal Mapping Reference

The most critical part of wiring a switched outlet is knowing exactly which wire color lands on which terminal screw. The table below maps the standard US residential color codes (NEC Article 200 and 210) to the physical terminals on your devices.

Note: If you are wiring a fully switched outlet (where both top and bottom halves turn on and off together), you will not use a red wire, and you will not break the brass tab on the receptacle. The switch simply interrupts the black hot wire.

Mains Safety Protocol: De-Energize and Verify

1. Identify and Trip the Breaker: Locate the correct 15A or 20A single-pole breaker in the main service panel and switch it to the OFF position. Apply a lockout/tagout (LOTO) device if you are not the only person in the home.
2. Initial NCVT Sweep: Use your non-contact voltage tester (e.g., Fluke 1AC-II) to scan the faceplate, the switch toggle, and the receptacle slots. The tester should remain silent and unlit.
3. Contact Verification (Mandatory): Remove the faceplate. Insert the probes of a contact voltage tester (like the Klein RT210) into the receptacle slots (Black-to-White, Black-to-Ground, and Red-to-White). The meter must read 0.0V. If you read any voltage above 2V, stop immediately; you have turned off the wrong breaker or have a backfed multi-wire branch circuit (MWBC).

Step-by-Step: Wiring a Half-Switched (Split) Outlet

This configuration assumes you are running a new 14/3 NM-B cable from a single-pole switch to the outlet location. The power source (14/2) enters the switch box first.

Step 1: Prep the Receptacle (Break the Tab)
Take your Leviton duplex receptacle and locate the small brass fin (connecting tab) on the hot side (the side with the brass screws). Using your needle-nose pliers, bend this tab back and forth until it snaps off completely. Do not break the silver tab on the neutral side. The top and bottom brass screws are now electrically isolated from one another.

Step 2: Terminate the Grounds
In the switch box, connect the bare copper ground from the incoming 14/2 source, the bare copper from the outgoing 14/3, and a 6-inch bare copper pigtail using a WAGO 221 connector. Attach the other end of the pigtail to the green ground screw on the switch. In the outlet box, pigtail the 14/3 bare ground to the green ground screw on the receptacle. Torque to 12 in-lbs.

Step 3: Terminate the Neutrals
In the switch box, connect the white neutral from the 14/2 source directly to the white neutral of the 14/3 cable. Cap them with a wire nut. The switch does not use a neutral. In the outlet box, strip 3/4 inch of insulation from the white neutral wire of the 14/3 cable. Form a J-hook and connect it to the top silver screw on the receptacle. Run a short white pigtail from the top silver screw to the bottom silver screw (or use the intact silver fin tab to carry the connection, terminating the main white wire to either silver screw).

Step 4: Switch Terminations
Connect the black (always hot) wire from the incoming 14/2 power source to the bottom brass screw on the switch. Connect the red (switched hot) wire from the outgoing 14/3 cable to the top brass screw on the switch. Torque both terminal screws to the manufacturer's specification (typically 12 to 14 in-lbs for 14 AWG wire).

Step 5: Receptacle Hot Terminations
At the outlet box, connect the black (always hot) wire from the 14/3 cable to the bottom brass screw on the receptacle. Connect the red (switched hot) wire from the 14/3 cable to the top brass screw on the receptacle. Ensure no bare copper is exposed outside the terminal saddle, and no insulation is pinched under the screw.

Step-by-Step: Wiring a Fully Switched Outlet

If your goal is to have the wall switch control the entire receptacle (common for garbage disposals or holiday lighting outlets), the process is simpler and requires only 14/2 or 12/2 NM-B cable.

1. Do Not Break Any Tabs: Leave both the brass and silver connecting fins on the receptacle completely intact.
2. Neutral Bypass: Connect the white neutral wires from the source and the outlet box directly together with a wire nut. Run a white pigtail from this bundle to the silver screw on the receptacle.
3. Switch the Hot: Connect the incoming black hot wire to one brass screw on the switch. Connect the outgoing black wire (leading to the outlet) to the other brass screw on the switch.
4. Outlet Hot: Connect the black wire coming from the switch to either brass screw on the receptacle. The intact brass tab will distribute power to both the top and bottom halves simultaneously.

Verification, Testing, and the Most Common Botch

Once all devices are pushed into the boxes, secured with 6-32 machine screws, and covered with the faceplate, restore power at the breaker panel.

Testing Protocol:

1. Plug a standard receptacle tester (e.g., Gardner Bender GFI-3501) into the bottom half of the outlet. The tester should show "Correct" (typically two yellow LEDs illuminated).
2. Plug the tester into the top half. With the switch OFF, the tester should show no power. Flip the switch ON; the tester should now read "Correct".
3. Multimeter Verification: Set your digital multimeter to AC Voltage (V~). Measure between the hot slot and the neutral slot on the switched half (switch ON). You should read between 114V and 126V (the acceptable ANSI C84.1 range for a 120V nominal system). Measure between neutral and ground; this should read less than 2V. Any reading above 2V on neutral-to-ground indicates a loose neutral connection or an overloaded shared neutral.

Always double-check your tab configuration before pushing the device into the box. For further reading on device torque specifications and box fill calculations, refer to the National Fire Protection Association's NEC resources and the Consumer Product Safety Commission's electrical safety guidelines.