The white neutral wire in the new switch box complies with NEC 2011 requirements. With this arrangement, all the other receptacles are wired directly to the hot source and the switch controls the middle outlet only. The neutral wire in the new switch box is capped with a wire nut unless it's needed for a smart switch or timer. The line wires are the incoming power from the breaker box and the load wires are the outgoing power that travels down the circuit to the next. There are two types of wires attached to the receptacle. Once out, detach and separate the wires (Image 2). The red wire from the switch loop is connected directly to the hot terminal on the outlet.Īt the switch, the black wire is connected to one terminal and the red wire is connected to the other. Unscrew receptacle outlet from the box (Image 1). Likewise, the new ground wire is spliced into the circuit at the receptacle. ![]() The source neutral remains pigtailed to the neutral on the receptacle and the new neutral wire is added to the splice. The hot source at the outlet is spliced to the black wire running to the switch and the hot wires running to the other outlets in the circuit. ![]() The switch takes the hot from the middle receptacle here and 3-wire cable runs from there to the new switch location. Here a switch has been added to control an existing receptacle. A neutral connection like this is now required in most new switch boxes as of the NEC code changes in 2011. Here the source neutral is spliced to the receptacle and to the white wire running through to the switch box where it can be used to connect a switch that requires a neutral such as a smart dimmer or timer. This is an updated diagram for the previous circuit. With this arrangement the top half of the duplex is controlled with the switch and the bottom half is always hot. ![]() The black on the switch loop runs from the switch to the top half of the receptacle. The circuit is wired from a 20amp (non-gfi) breaker to the line side of the GFI outlet, then from the load side of the GFI outlet to the relay for the lights, and then AUXn. The white wire on the switch loop is used to carry current from the source to the switch and it is marked with black tape or paint to label it as hot. There is a GFI outlet mounted in the side of the control panel cabinet, with a weatherproof outdoor cover. The source neutral is connected to one of the neutral terminals on the receptacle. The tab connecting the hot terminals on the receptacle is removed and the source hot is connected to the bottom half. This diagram illustrates the wiring for a split half outlet controlled with a switch loop. Wiring a Split Switched Outlet with a Switch Loop
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