220-volt outlet for large appliances such as washer, dryer, refrigerator and stereo equipment

alternating current—current that changes direction on regular intervals

aluminum wiring was used in homes in the ’60s and ’70s and is now deemed unsafe and more likely to cause a fire. Industry standard today is copper

unit of measurement for intensity of electrical current

security systems including Closed Circuit Televisions (CCTV) used to digitally record specific locations through strategically placed cameras. Card access systems require specific key cards to unlock high-tech security locks

a complete circle from the source of energy through the conductors and then back to the energy source

equipment used to open and close circuits to predetermined currents without damage

making sure all electrical wiring is up to local code standards

a substance that is able to transfer electricity

a tube used to enclose electric wires or cables