National Home Inspector Exam 2024

National Home Inspector Exam 2024 Ampacity - Answer ️️ -The maximum current, in amperes, that a conductor can carry continuously under the conditions of use without exceeding its temperature rating. American Wire Gauge (AWG) - Answer ️️ -an standard method of denoting the diameter of electrically conducting wire Bonding - Answer ️️ -The process of connecting, both physically and electrically, metal components of the electrical system that are not intended to carry electrical current to provide a low resistance return path to the circuit breaker or fuse to clear ground faults; bonding is an elecsafety system. system. Branch Circuit - Answer ️️ -Conductors that begin at a circuit breaker or fuse and serve one or more oulets. Branch Circuit, multiwire - Answer ️️ -A branch circuit in which two energized conductors share one neutral, examples can include clothes dryers, ranges and other cooking appliances, and split-wire receptacle circuits, 240 volt water heaters and condensers for air conditioners and heat pumps are not usually branch circuits. Bus (buss, busbar) - Answer ️️ -the heavy, rigid metal part of a panelboard on which circuit breakers or fuses are mounted; sometimes used to describe metal terminals to which the neutral and equipment grounding conductors (EGCs) are connected. Cable - Answer ️️ -two or more conductors encased in sheathing; examples include non- metallic sheathed cable (Brand Romex) and armored cable (Brand BX) circuit breaker - Answer ️️ -overcurrent protection device (OPD) Conductor - Answer ️️ -a material, such as copper or aluminum, that permits electricity to flow with low resistance, wires are conductors. Current - Answer ️️ -the amount of electricity in a circuit. Unit of measure is the ampere (amp); expressed as I in Ohm's Law and Watt's Law equation. Dead front cover - Answer ️️ -a panel that is removed to gain access to the energized components inside an enclosure; the dead front cover is usually behind a door that must be swung or lifted to gain access to the dead front cover. EGC - Answer ️️ -Equipment grounding conductor Enclosure (electrical) - Answer ️️ -a case or cabinet intended to prevent accidental contact with energized parts, a panelboard is housed inside an enclosure. Feeder conductors - Answer ️️ -conductors from the service equipment or from a panelboard that supply electricity to another panelboard such as a subpanel. Fuse - Answer ️️ -Overcurrent protection device (OPD) Grounded - Answer ️️ -a conductor that is intentionally connected to earth; this describes what is often called the neutral conductor. grounding - Answer ️️ -providing an intentional connection to earth, grounding provides an alternate path for current to return to its source; in an electrical power system, the source is the utilities transformer and ultimately power plant. See grounding electrode and grounding electrode conductor (GEC). Grounding Conductor, Equipment (EGC) - Answer ️️ -a bare or insulated conductor that provides a ground fault current path (a bonding connection) for equipment with metal cases and parts; these have been installed in most house branch circuit wiring since around 1960. grounding electrode - Answer ️️ -metal that is in direct contact with the earth and serves as the electrical system grounding connection; examples include copper coated steel rods, galvanized steel pipes, water service and well pipes, and reinforcing steel encased footings. grounding electrode conductor (GEC) - Answer ️️ -a conductor that runs between the grounding electrode and an accessible point downstream from where the grounded service entrance conductor connects to the service drop or lateral; the GEC connection is usually at the service equipment. Ground fault - Answer ️️ -an event that occurs when metal that should not conduct electricity (such as a metal water pipe) becomes energized; if the metal is properly bonded, current flow should increase in the circuit and trip the circuit breaker or fuse. Ground Fault Circuit Interrupter (GFCI) - Answer ️️ -a circuit breaker or receptacle that detects a ground fault by monitoring the imbalance in current flow between the energized and neutral conductors and stops current flow kopens the circuit) when a ground fault is detected. Joules Law - Answer ️️ -a formula for calculating heat in an electrical circuit expressed as Heat = Current▪︎ 2 X Resistance X Time. Knockouts - Answer ️️ -stamped openings in an enclosure where conduit or cable clamps are installed to secure conductors or cables. See Tabs (twistouts). Load Center - Answer ️️ -See Panel (panelboard, load center) Lug - Answer ️️ -a connection point where conductors are inserted and secured; examples include the connection points on panelboards for service entrance and feeder conductors, on terminal bars for neutral and EGCs, and on circuit breakers for branch circuit c