In terms of running a present day home, the Electrical System is probably second only to indoor plumbing in importance. Without electricity we would still be using blocks of ice to power our refrigerators, and candles to light our rooms at night. And then there are the various gadgets that are virtually dead without access to electricity. The wiring then conducts the electricity to a variety of sockets that can then be used by the homeowner to plug or screw things into, as well as switches that are used to control the flow of electricity to light fixtures.