Do you connect black wire to gold screw and white wire to wwwers››Modification of Old Electrical WorkDo you connect black wire to gold screw and white wire to silver screw in light fixture? AC, the rated voltage) between the wire and the earth is the Live wire. . Typically a black and Color-Coding of Electrical Wires and Terminal Screws A simple standard electrical circuit has a black or red "hot" wire that carries power from the power source to the device (switch, fixture, outlet, appliance, etc.), a white neutral wire that carries the power back to the power source, and a green or bare copper ground wire that connects the device to the home's grounding system.