This is another option for wiring a combo device where two sources are used. In this arrangement the connecting tab between the hot terminals on the device is broken off to separate the two. The switch controls a light and the receptacle half of the combo device is always hot.
With this wiring, both the black and white wires are used to carry 120 volts each and the white wire is wrapped with electrical tape to label it hot. This circuit doesn’t make use of a neutral wire and the ground wire is connected to the ground terminal on the device. The slots are configured to accept only plugs from compatible appliances.
This receptacle can typically be found in living room and bedroom wall outlets. One of these may be controlled with a switch and/or wired to other receptacles in the circuit. For a 15 amp receptacle like this, 14/2 cable with ground should be used to feed the circuit.
Instead of terminals, a 3 way dimmer has 4 wires coming out of the casing: one common, two travelers and one ground wire. 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 wire.
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