Switches are used everyday in every facet of our lives. From turning on and off your lights, to operating appliances. Properly functioning switches are vital to your home. Switches work by bringing two contacts together. In the case of home or office wiring, these are referred to as snap switches. Snap switches hold the contacts under a certain tension, and when "turned on" they release that tension. This causes the switch to complete the circuit and hold tight. When "turned off" they release an opposite tension and rapidly disconnect the circuit.