Things You'll Need
If applicable connect the green grounding wire, or bare copper grounding wire, to the green ground screw on the metal housing of the switch. Not all home wiring setups use a grounding system. Follow all local electrical codes when servicing or installing any electrical component.
Double-pole switches use two separate sets of contacts to control electrical power. There are also two-sets of screw terminals on the side of the switch for the connection of the wires. Power is fed to the switch from the main electrical panel through a 220-volt double-pole circuit breaker. This electrical power supply is called the line feed. The wires going to the device that the switch controls are the load wires.
Shut off the electrical supply by switching off the double-pole circuit breaker.
Strip off a 1/2 inch of the wire insulation with the wire strippers, revealing the bare copper underneath.
Bend a small hook in the bare copper ends of the wires with the wire pliers. Loosen the terminal screws on the switch by turning them in a counterclockwise direction.
Fit the bare copper ends of the wires coming from the main electrical supply panel under the screws identified as "line." Place one wire under each screw. Tighten the wires with the screwdriver in a clockwise direction.
Connect the two load wires going to the device under the screw terminals marked as "load." Attach one wire to one each of the terminal screws and tighten.
G.K. Bayne is a freelance writer for various websites, specializing in back-to-basics instructional articles on computers and electrical equipment. Bayne began her writing career in 1975 and studied history at the University of Tennessee.