In this updated diagram 3-conductor cable runs between the receptacle and switch, and the red cable wire is used to carry the hot source to the bottom terminal on the switch. The neutral from the source is passed through to the switch box using the white wire and in this diagram the white wire is capped with a wire nut.
Here two 3 way switches control a wall receptacle that may be used to control a lamp from two entrances to a room. This circuit is wired the same way as the 3 way lights at this link.
This is an older version of the receptacle in the first diagram. The slots are different sizes to accept polarized plugs, but it lacks a grounding slot. This device does not make use of a ground wire. There is no protection against electrocution as provide by the grounded receptacle.
At the receptacle the black cable wire from SW1 is connected to one of the hot terminals and the red wire is spliced to the white wire on the 2-conductor cable running to SW2. The white wire is wrapped with electrical tape to mark it as hot. The black wire is connected to the second hot terminal on the receptacle and to the top terminal on SW2 at the other end.
This page contains wiring diagrams for household light switches and includes a switch loop, single-pole switches, light dimmer, and a few choices for wiring a combo switch/outlet device. Also included are wiring arrangements for multiple light fixtures controlled by one switch, and a split receptacle controlled by two switches.
This is the standard 15 amp 120 volt wall receptacle outlet wiring diagram. This is a polarized device. The long slot on the left is the neutral contact and the short slot is the hot contact. A grounded contact at the bottom, center is crescent shaped. Don’t use this receptacle when no ground wire is available.
The common wire is usually black and the travelers red, in any case, the traveler wires will usually be the same color to distinguish them from the common. The stranded wires on the dimmer are spliced to the cable wires from the circuit.
Three-way switches allow for controlling a light fixture from two separate locations, these are usually used at the top and bottom of a flight of stairs or at two different entrances to a room. On this page are several wiring diagrams that can be used to map 3 way lighting circuits depending on the location of the source with relation to the lights.
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