A switched outlet—commonly called a half-hot receptacle—routes unswitched line voltage to one half of the duplex while feeding the other half through a wall switch. The direct answer to wiring this configuration is to break the brass hot-side tab on the receptacle, land the always-hot black wire on one brass terminal, land the switched-leg red wire on the other brass terminal, and keep the silver neutral-side tab intact to share the white neutral wire. Below is the complete node-by-node trace, terminal map, and verification protocol to execute this flawlessly.
Decoding the Switched Outlet Wiring Diagram Symbols
Before pulling wire, you must understand what the standard schematic symbols represent in a switched outlet wiring diagram. Electrical blueprints and reference guides (like those from the National Electrical Code) use specific iconography to denote split-wired devices.
- Receptacle Symbol: A circle with an intersecting cross or two parallel slots. In a half-hot diagram, you will often see a dashed line bisecting the symbol, or two distinct receptacle symbols stacked, indicating the internal busbar split.
- Switch Symbol: A straight line with a gap and an angled bypass line representing a Single-Pole Single-Throw (SPST) switch.
- Switched Leg (Dashed Line): While solid lines represent unswitched, always-hot conductors, a dashed or dotted line routed from the switch to the receptacle universally denotes the "switched leg" (the conductor that only carries voltage when the switch is closed).
- Ground Symbol: A solid line descending into three parallel horizontal lines of decreasing width. This represents the equipment grounding conductor (EGC) path back to the panel's ground bus.
Node-by-Node Trace: Source to Load
Abstract diagrams omit the physical reality of wire splices and box fill. Here is the exact textual trace for a standard 15-amp residential circuit using 14/2 NM-B from the panel to the switch, and 14/3 NM-B from the switch to the receptacle.
- Node 1: Panel to Switch Box. A 14/2 NM-B cable originates at a 15A breaker. The black (hot) and white (neutral) conductors enter the switch box. The bare copper ground bonds to the metal box (if applicable) and a ground pigtail.
- Node 2: The Switch Box Splices.
- Neutral: The 14/2 white neutral is wire-nutted directly to the 14/3 white neutral. The switch does not interrupt the neutral.
- Ground: All bare copper wires (14/2, 14/3, and switch grounding screw) are bonded together with a wire nut or crimp sleeve.
- Hot In: The 14/2 black hot is pigtailed to the bottom brass terminal of the SPST switch.
- Switched Leg Out: The 14/3 red wire is landed on the top brass terminal of the switch.
- Node 3: Switch to Receptacle Box. The 14/3 NM-B cable arrives at the receptacle box carrying four conductors: Black (always-hot pass-through from the switch box wire nut), Red (switched-hot from the switch), White (shared neutral), and Bare (equipment ground).
- Node 4: Receptacle Terminals & Polarity.
- Ground Path: Bare copper lands on the green grounding screw. This provides the fault-current path back to the panel.
- Neutral Path: White wire lands on one of the silver terminals. The silver tab remains intact, bonding both duplex halves to the same neutral.
- Always-Hot: Black wire lands on the top brass terminal.
- Switched-Hot: Red wire lands on the bottom brass terminal. Critical Step: The brass connecting tab between the top and bottom brass terminals must be physically snapped off to isolate the two halves.
Physical Device Terminal Mapping & Verification
Knowing the diagram is half the battle; executing it on a physical device like a Leviton 5262 15A duplex receptacle requires precise terminal identification and mechanical verification. Modern NEC cycles (specifically 110.14(D)) mandate that terminals marked with torque values must be tightened with a calibrated torque screwdriver.
| Terminal Screw Color | Physical Location | Function | Wire Color (14/3) | Torque Spec (14 AWG) |
|---|---|---|---|---|
| Brass | Top Right (Strap side) | Always-Hot Line | Black | 14 in-lbs |
| Brass | Bottom Right (Strap side) | Switched-Hot Load | Red | 14 in-lbs |
| Silver | Top / Bottom Left | Shared Neutral | White | 14 in-lbs |
| Green | Bottom Center | Equipment Ground | Bare Copper | 14 in-lbs |
Never use a flathead screwdriver to pry the brass tab off. Prying applies torsional stress that can crack the phenolic resin body of the receptacle, creating a hidden internal fault. Instead, grip the tab with diagonal cutting pliers or lineman's pliers and bend it back and forth until it snaps cleanly at the score line.
Multimeter Verification Protocol
Do not rely on visual inspection alone. Use a digital multimeter (like a Fluke 117) to verify your work at two distinct stages.
Stage 1: De-energized Continuity Check (Power OFF)
- Set your meter to the Continuity setting (the sound-wave icon).
- Place one probe on the top brass terminal and the other on the bottom brass terminal. The meter must read OL (Open Line) or infinite resistance. If it beeps, the brass tab is not fully broken, and you will short the switched leg to the always-hot when energized.
- Place one probe on the top silver terminal and the other on the bottom silver terminal. The meter must beep (read near 0.0 ohms), confirming the neutral busbar is intact.
Stage 2: Energized Voltage Check (Power ON)
- Set your meter to AC Voltage (V~).
- With the wall switch OFF, measure between the top brass slot (hot) and the silver slot (neutral). You should read 114V to 126V (nominal 120V).
- Measure between the bottom brass slot and the silver slot. You should read 0V.
- Toggle the wall switch ON. Measure the bottom brass slot to silver slot again. The reading must now jump to 114V to 126V.
Switched Outlet Wiring FAQ
Can I wire a switched outlet with only 14/2 cable?
Yes, but it requires a different topology known as a "switch loop." In a switch loop, the 14/2 cable runs from the receptacle box to the switch box. The white wire (re-identified with black tape at both ends) acts as the always-hot feed up to the switch, and the black wire acts as the switched leg returning to the receptacle. However, the 2011 NEC update (Article 404.2) requires a grounded (neutral) conductor at every switch location to accommodate smart switches and timers. Therefore, running 14/3 to the switch box is the modern code-compliant standard, even if the neutral sits unused in the switch box.
Why did my switched outlet wiring diagram trip the GFCI breaker?
If your half-hot receptacle is fed by a GFCI breaker or is downstream of a GFCI receptacle, tripping usually indicates a neutral-to-ground fault or a shared neutral issue. If you are feeding the switched outlet from the "LOAD" terminals of an upstream GFCI receptacle, the downstream neutral must return exclusively to that specific GFCI. If the switched outlet shares a neutral with a non-GFCI protected circuit (a borrowed neutral), the GFCI will detect an imbalance between the hot and neutral currents and trip immediately upon switching the load on. Ensure the neutral serving the switched outlet originates from the same line source as the hot wires.
Do I need to break the silver neutral tab on a half-hot receptacle?
No. For a standard switched outlet using a single 14/3 or 12/3 cable, the silver neutral tab must remain intact so both halves of the receptacle share the single white neutral wire. You only break the silver tab in a Multi-Wire Branch Circuit (MWBC) scenario where you have two separate hot wires (e.g., black and red) on opposite phases (240V across them) sharing a single neutral. Breaking the tab in a standard single-pole switched setup will result in the bottom half of the receptacle having no return path, rendering it dead.
How do I convert a switched outlet back to always-hot?
To revert a half-hot receptacle to a standard always-hot duplex outlet, first turn off the breaker. Remove the red (switched) wire from the bottom brass terminal and cap it with a wire nut. Next, take the black (always-hot) wire and pigtail it with two short 14 AWG black jumpers. Land one jumper on the top brass terminal and the other on the bottom brass terminal. Alternatively, if the brass tab was previously broken off, you can simply land the black wire on one brass terminal and a jumper on the other. Leave the white neutral and bare ground untouched. The wall switch will now be dead and can be capped off or removed in the switch box.
