When you need a single wall outlet to serve both a permanently powered device (like a router or vacuum) and a switched load (like a floor lamp), you are looking for a half-switched receptacle. The switch controlled outlet wiring diagram for this setup requires a specific physical modification to the receptacle and a 3-wire cable run between the switch and the outlet to maintain modern code compliance.
Rather than leaving you with a generic 'it depends on your setup' answer, this guide establishes a concrete baseline. We will trace the exact path for a 15-amp, 120-volt circuit using 14 AWG copper wire, terminating at a standard duplex receptacle with the hot-side tab removed.
The Default Pick: 15A Half-Switched Receptacle Setup
This specific combination is the default recommendation because it satisfies NEC Article 404.2(C), which mandates that a neutral conductor be provided at the switch location. Older 'switch loop' diagrams that send only a 2-wire cable to the switch are now code violations in most new residential construction because they prevent the future installation of smart switches or timers that require standby power.
Decoding the Diagram Symbols
Architectural and electrical blueprints use standardized symbols to represent these components. If you are reading a printed switch controlled outlet wiring diagram, here is how to translate the graphical shorthand into physical hardware:
- Circle with an 'S' inside: Single-pole switch. If it has a '3' inside, it is a 3-way switch (not used in this basic diagram).
- Circle with a semi-circle and two parallel lines protruding: Standard duplex receptacle.
- A diagonal line striking through half the receptacle symbol (or the text 'H' / 'W' next to it): Indicates a half-switched (split-wired) receptacle. The top half is controlled by the switch; the bottom half is always hot.
- Straight lines with '2' or '3' hash marks: Represents the cable type. Two marks mean a 2-conductor cable with ground (e.g., 14/2 NM-B). Three marks mean a 3-conductor cable with ground (e.g., 14/3 NM-B).
Terminal and Pin Mapping Table
Before making any connections, you must understand the physical terminal layout on the Leviton 5623-2W receptacle and the single-pole switch. Polarity is critical: the brass screws are for hot conductors, and the silver screws are for the grounded (neutral) conductor.
| Device | Terminal / Screw Color | Function | Wire Color Connected (15A Setup) |
|---|---|---|---|
| Single-Pole Switch | Brass Screw 1 (Line) | Always-Hot Feed | Black (from 14/2 panel feed) |
| Single-Pole Switch | Brass Screw 2 (Load) | Switched-Hot Output | Red (from 14/3 to outlet) |
| Single-Pole Switch | Green Screw | Equipment Ground | Bare copper (pigtail to both cables) |
| Duplex Receptacle | Bottom Brass Screw | Always-Hot (Unswitched) | Black (from 14/3 from switch) |
| Duplex Receptacle | Top Brass Screw | Switched-Hot | Red (from 14/3 from switch) |
| Duplex Receptacle | Silver Screws (Both) | Grounded (Neutral) | White (pigtail to both cables) |
| Duplex Receptacle | Green Screw | Equipment Ground | Bare copper (pigtail to 14/3 ground) |
Node-by-Node Trace: Source to Load
Let's trace the current path from the breaker panel to the final loads. This assumes power enters the switch box first, which is the most efficient and code-compliant routing for this specific diagram.
- Node 1: The Panel. A 15A single-pole breaker connects to the black (hot) wire of a 14/2 NM-B cable. The white (neutral) connects to the neutral busbar, and the bare wire connects to the ground busbar.
- Node 2: The Switch Box. The 14/2 NM-B enters the switch box. The bare ground wires from the 14/2 and the outgoing 14/3 are spliced together with a green wire nut, and a 6-inch bare copper pigtail is run to the green ground screw on the switch.
- Node 3: The Switch Terminals. The black wire from the 14/2 (always-hot) connects to the bottom brass screw on the switch. The red wire from the 14/3 NM-B (switched-hot) connects to the top brass screw. The white wires from both the 14/2 and 14/3 are spliced together with a wire nut and pushed to the back of the box—they do not connect to the standard single-pole switch.
- Node 4: The Outlet Box. The 14/3 NM-B enters the receptacle box. The bare ground is pigtailed to the green ground screw on the receptacle. The white neutral is pigtailed to the silver screws on the receptacle.
- Node 5: The Receptacle Hot Side. The black wire from the 14/3 (which has been carrying always-hot parallel to the switch) connects to the bottom brass screw. The red wire from the 14/3 (carrying the switched-hot from the switch) connects to the top brass screw.
- Node 6: The Loads. Current flows continuously to the bottom receptacle slot. Current flows to the top receptacle slot only when the switch lever closes the internal contacts, bridging the black feed to the red output.
Step-by-Step Verification with a Multimeter
Never assume a wiring diagram was executed correctly just because the wires match the colors. You must verify the physical installation. Use a CAT III or CAT IV digital multimeter (like a Fluke 117 or Klein MM400) and a non-contact voltage tester (NCVT).
Phase 1: De-Energized Verification (Breaker OFF)
- Ground Path Continuity: Set the meter to continuity (ohms/beep). Place one probe on the panel's ground busbar and the other on the receptacle's green ground screw. The reading must be less than 1.0 ohm. This verifies the equipment grounding conductor is unbroken.
- Tab Break Verification: With the meter still in continuity mode, place one probe on the top brass screw and the other on the bottom brass screw of the receptacle. The meter must read 'OL' (Open Loop) or infinite resistance. If it beeps or reads near 0 ohms, the brass break-off tab is still intact and must be removed.
- Neutral Continuity: Place one probe on the panel neutral busbar and the other on the receptacle's silver screw. Reading should be < 1.0 ohm.
Phase 2: Energized Verification (Breaker ON, Switch OFF)
- Verify Always-Hot: Set the meter to AC Voltage (V~). Place the black probe on the bare ground wire (or ground screw) and the red probe on the bottom brass screw. You should read between 114V and 126V (nominal 120V).
- Verify Switched-Hot (Off State): Move the red probe to the top brass screw. With the wall switch in the OFF position, the meter should read 0V (or a negligible ghost voltage under 2V).
- Verify Switched-Hot (On State): Toggle the wall switch to ON. The meter, still probing the top brass screw and ground, should now read 114V-126V.
- Check for Reversed Polarity: Probe from the bottom brass screw to the silver screw. You should read 120V. If you read 0V here but read 120V from brass to ground, your neutral connection is open or broken upstream.
Decision Tree: Which Switched Outlet Variant Do You Need?
While the half-switched 15A setup is the default, specific use cases require deviations. Use this decision matrix to confirm your final hardware pick.
| Criterion | Half-Switched (Default) | Fully Switched | Smart Switch / Smart Plug |
|---|---|---|---|
| Primary Use Case | Living room/bedroom floor lamp + always-on vacuum or router. | Garage workbench or utility sink where all tools must be de-energized for safety. | Home automation, scheduling, or voice control of lighting. |
| Receptacle Tab | Brass tab removed; Silver tab intact. | Both brass and silver tabs removed (or both left intact if switched at the breaker/source). | Tabs intact; switching handled upstream or via plug. |
| Cable Requirement | 14/3 NM-B between switch and outlet. | 14/2 NM-B is sufficient if neutral isn't needed at the switch. | 14/3 NM-B required (NEC 404.2(C) neutral at switch). |
| Default Hardware Pick | Leviton 5623-2W (Receptacle) + 5603-2W (Switch) | Leviton 5262-2W (Single Receptacle) or standard duplex. | Lutron Caseta PD-6ANS (Switch) + Pico Remote. |
The Final Verdict: Unless you are wiring a dedicated utility workbench where OSHA or local shop safety rules dictate total power-disconnect for the bench (choose Fully Switched), or you are actively building a smart home mesh network (choose Smart Switch), stick to the Half-Switched default. It provides the maximum utility for standard residential rooms, maintains full NEC compliance regarding switch-box neutrals, and utilizes the most cost-effective, widely available hardware at your local supplier.
