Residential Electrical Services Exam Questions and Answers 100% Correct.

appliances - ANSWER-Equipment designed for a particular purpose (for example, using electricity to produce heat, light, or mechanical motion). Appliances are usually self-contained, are generally available for applications other than industrial use, and are normally produced in standard sizes or types. Bonding bushing - ANSWER-A special conduit bushing equipped with a conductor terminal to accept a bonding jumper. It also has a screw or other sharp device to bite into the enclosure wall to bond the conduit to the enclosure without a jumper when there are no concentric knockouts left in the wall of the enclosure. Bonding jumper - ANSWER-A bare or green insulated conductor used to ensure the required electrical conductivity between metal parts required to be electrically connected. Bonding jumpers are frequently used from a bonding bushing to the service-equipment enclosure to provide a path around concentric knockouts in an enclosure wall, and they may also be used to bond one raceway to another. Branch circuit - ANSWER-The portion of a wiring system extending beyond the final overcurrent device protecting a circuit. Feeder - ANSWER-A circuit, such as conductors in conduit or a cable run, that carries current from the service equipment to a subpanel or a branch circuit panel or to some point in the wiring system Load center - ANSWER-A type of panelboard that is normally located at the service entrance of a residential installation. It sometimes contains the main disconnect. Metal-clad (Type MC) cable - ANSWER-A factory assembly of one or more insulated circuit conductors with or without optical fiber members enclosed in an armor of interlocking metal tape, or a smooth or corrugated metallic sheath. Nonmetallic-sheathed (Type NM) cable - ANSWER-A factory-assembly of two or more insulated conductors enclosed within an overall nonmetallic jacket. Type NM contains insulated conductors enclosed within an overall nonmetallic jacket; Type NMC contains insulated conductors enclosed within an overall, corrosion resistant, nonmetallic jacket; and Type NMS contains insulated power or control conductors with signaling, data, and communications conductors within an overall nonmetallic jacket.