| A | B |
| Circuit | is a pathway for electricity that incorporates outlets and returns to ground. |
| Amperage | is the measure of electrical current. |
| Voltage | is the measure of electrical pressure. |
| Wattage | is the measure of electrical power. (volts X amps=watts) |
| Ohms | is the measure of resistance in a conductor. |
| Kilowatt hour | 1000 watts of power- unit used to purchase electricity |
| Transformers | steps up or down electrical voltage to maintain the flow of electricity. |
| Overloads | occur when more power is drawn from a circuit than the circuit can handle. |
| Circuit Breaker | is a safety device that shuts off a circuit to prevent overloads It can be switched back on once the overload is removed. |
| Fuse | is a safety device that shuts off a circuit to prevent overloads and has to be replaced with a new fuse of the same amperage. |
| GFI circuit breaker | is a ground fault interrupt senses a faulty ground and shuts off immediately to prevent electrocution. |
| Duplex outlet | is a standard electrical convenience outlet with two receptacles. It is the most common outlet found throughout the house that allows direct access to electrical power. |
| Split wired Duplex outlet | one of the duplex outlets is controlled by a switch. |
| Ground | direct physical connection to the earth. |
| Legend | identifies all the symbols that used on the electrical plan. |
| Two Way Switch | has an on position and an off position. |
| Three Way Switch | on off from two different locations two point control. |
| Dimmer Switch | controls the intensity of the light/bulb. |
| Typical Light Circuit | 120volts 15 amps |
| Typical Appliance Circuit | 120 volts 20 amps |
| Range Outlet | 240 volts 40amps |
| Dryer Circuit | 240 volts 30 amps |