The National Electrical Code establishes requirements for electrical wiring and equipment. Electrical codes provide standards to ensure electrical wiring systems are safe.
Wire gauge is a measurement of wire diameter. This
determines the amount of electric current a wire can safely carry, as well as
its electrical resistance and weight.
Electricity is a flow of electrons. A complete circuit is
needed for electricity to flow. From the main electric service panel,
electricity is divided into circuits throughout a building.
A circuit breaker’s job is to limit the amount of current
flowing on a circuit so that it doesn’t exceed the rated level. The most common
cause of circuit breaker failure is continually overloading it, causing it to
trip out or open the circuit.