How To Wire A Light Switch With A Red Wire. Always place wire caps over unused wires. Wire manufacturers supply wire in a wide variety of colors, and it is up to the electrician to use the correct wire color in home wiring.
Single-pole light switch controls lights from one location. How to Replace a Light Switch. Some light fixtures provide a mounting hole for the photoelectric switch.
Most modern switches have screw terminals on each side and may also have holes in the back to accept the end of the wire.
The most common requirement of any hardwired automated light switch is a neutral wire.
Wiring a ceiling fan with four wires is the most common, however, an additional color wire may be incldued. The red wire connects one set of brass terminals on the two switches, and the black wire connects the other. When there is an extra hot wire, it is red.