I am replacing a standard duplex outlet with a combination outlet/nighlight. The outlet is wired with 4 wires (2 white, 2 black), but the new combination receptacle only needs 2 wires. What do i do with the other wires? thanks
One set of wires (one white, one black) will be the power coming into the box. The other set will be power leaving the box for the next outlet on the circuit. Attach a 6 inch length of black wire to the hot terminal (brass screw) on the new outlet, and a 6 inch length of white wire to the neutral terminal (silver screw) of the new outlet. Next, use wirenuts to attach all the black wires to each other, and all the white wires to each other.
You should also have two ground wires in the box, so the same deal applies. 6" length of bare wire to the ground screw on the new outlet, wirenutted to the two grounds in the box.