Electrical cables are bundles of insulated conductors enclosed in a protective outer sheath. They come in various types, including non-metallic (NM) cable for residential wiring and armored cable (AC) for more robust applications. Cables are used for both power distribution and wiring for devices.

Circuit breakers and fuses are protective devices that interrupt the flow of electricity in case of overcurrent or short circuits. They help prevent electrical fires and equipment damage by shutting off power when necessary.