Browse 31 essential 24/7 emergency electricians terms and definitions used by professionals in Fort Wayne.
Term Index
Open any term below for a dedicated definition page.
Arc-Fault Circuit Interrupter is a protective device that detects dangerous electrical arcing and disconnects power before an arc can start a fire. An AFCI monitors the electrical waveform on a circuit, identifies patterns linked to loose connections or damaged wiring, and trips the circuit. AFCIs protect people and property from fire hazards.
Arc Fault is a unintended electrical discharge that jumps across a gap between conductors or through damaged insulation. The discharge creates intense heat and may ignite nearby materials. Arc faults can result from loose connections, pinched wires, worn cords, or damaged cables. An Arc-Fault Circuit Interrupter detects characteristic changes and disconnects power.
Battery Energy Storage System is equipment that stores electrical energy in rechargeable batteries and supplies that energy when needed. A battery energy storage system includes battery cells, power conversion equipment, controls, protection devices, and monitoring systems. The system can support backup power, solar energy use, demand management, and grid services.
Branch Circuit is the wiring path that carries electricity from a service panel or distribution panel to outlets, lights, appliances, or other connected loads. A branch circuit includes conductors, overcurrent protection, and the connected equipment. Circuit voltage, breaker size, wire gauge, and load determine how much power the circuit can safely deliver.
Busbar is a rigid metal conductor that distributes electrical power within switchboards, panelboards, switchgear, and other equipment. Copper or aluminum busbars carry high current through a compact path, often replacing several individual wires. Insulation, spacing, supports, and overcurrent protection help control heat, faults, and accidental contact.
Conduit is a tube or channel that protects and routes electrical wires and cables. Electricians install conduit in walls, ceilings, floors, underground runs, and exposed locations. Common materials include metal, PVC, and flexible metallic tubing. The correct conduit type and size depend on the wiring, location, physical hazards, and applicable electrical code.
Electrical Grounding is a safety system that connects electrical equipment and circuits to the earth or a grounded reference point. The connection gives fault current a low-resistance path away from people and property. Proper grounding helps protective devices trip during faults, reduces shock risk, and supports stable operation of electrical systems.
Electrical Load Calculation is a method for estimating the electrical demand of a building, dwelling, or system. The calculation adds expected loads from lighting, receptacles, appliances, heating, cooling, motors, and other equipment. The result helps determine the required service size, feeder capacity, conductor size, and overcurrent protection under applicable electrical rules.
Electrical Permit is an official approval that allows electrical installation, alteration, repair, or replacement work to proceed under adopted safety rules. A permit records the project scope, identifies responsible parties, and usually leads to an inspection. Local building departments set permit requirements, fees, application steps, and exemptions for specific electrical work.
Electrical Service is the complete system that delivers electric power from a utility source to a building, including the service drop, meter, service entrance conductors, main disconnect, and service panel. The system connects utility power to branch circuits and distributes electricity safely to lighting, outlets, appliances, equipment, and other electrical loads.
Electrical Service Drop is the overhead set of conductors that carries electricity from a utility pole or other utility support to a building’s service point. The service drop connects utility distribution equipment to the customer-owned service equipment, usually at the weatherhead or meter location. Its conductors carry the full incoming service load.
Electric Shock is an injury or harmful physiological response caused when electric current passes through the body. Severity depends on current strength, path through the body, contact time, voltage, and skin condition.
Electric Vehicle is a road vehicle powered partly or entirely by electricity stored in a battery or another energy system. Electric Vehicles use one or more electric motors instead of, or alongside, an internal combustion engine. Common types include battery electric vehicles, plug-in hybrid vehicles, and fuel cell electric vehicles.
Fuse is an overcurrent protection device that contains a metal element designed to melt when electrical current exceeds its rated value. The melted element opens the circuit and stops power from reaching downstream wiring or equipment. A fuse must be replaced after operation, unlike a resettable circuit breaker.
Ground-Fault Circuit Interrupter is a protective device that monitors current flowing through an electrical circuit. The device trips when it detects a small difference between outgoing and returning current. Which can indicate that electricity is flowing through a person or unintended path. This rapid interruption helps reduce electric shock risk in wet or damp locations.
Ground Fault is a unintended electrical connection between an energized conductor and a grounded surface, equipment frame, or person. This connection lets current leave its intended circuit path. The resulting current imbalance can cause electric shock, equipment damage, overheating, or fire. A ground-fault circuit interrupter can disconnect power quickly when it detects the imbalance.
Junction Box is an enclosed electrical box that protects and contains connections where two or more wires or cables meet. The enclosure shields splices from damage, limits contact with energized parts, and provides access for inspection or repair. Junction boxes may be metal or nonmetallic and must remain accessible after installation.
Line Voltage is the electrical potential supplied by a power source to a circuit, equipment, or building. It's measured in volts and usually describes the voltage available at an outlet, panel, or disconnect. In North American buildings, common line-voltage ratings include 120 volts, 208 volts, 240 volts, and 277 volts.
Lockout/Tagout is a safety process that prevents machines, equipment, and electrical systems from releasing hazardous energy during service or maintenance. Authorized workers isolate energy sources, apply physical locks and warning tags, release stored energy, and verify zero energy before work begins. The process protects workers from shock, burns, crushing, movement, and unexpected startup.
Megohmmeter is an electrical test instrument that measures very high resistance in insulation, usually in megohms. The instrument applies a controlled direct-current test voltage between conductors or between a conductor and ground. Electricians use the reading to find weakened, wet, contaminated, cracked, or aging insulation before leakage current creates shock, fire, or equipment problems.
National Electrical Code is a widely adopted set of safety rules for electrical design, installation, inspection, and maintenance. Published by the National Fire Protection Association as NFPA 70, it covers wiring methods, equipment, grounding, overcurrent protection, and special installations. Local authorities adopt, amend, and enforce the code through their own laws.
National Fire Protection Association is a nonprofit organization that develops codes, standards, research, and education to reduce fire, electrical, and related safety risks. Its best-known publication is NFPA 70, the National Electrical Code. NFPA doesn't enforce laws. Local or state authorities decide which editions and requirements apply.
Neutral Wire is the grounded conductor that carries electrical current back to the service panel after current flows through a load. In most North American wiring, the neutral wire connects to the neutral bus and normally has white or gray insulation. It works with a hot wire to complete a 120-volt circuit.
Ohm's Law is the relationship between voltage, current, and resistance in an electrical circuit. The law states that current equals voltage divided by resistance, written as I = V/R. Voltage pushes electrical charge, resistance limits its movement, and current measures the resulting flow through a circuit or component.
Overcurrent is an electrical condition in which current exceeds the safe rating of a conductor, circuit, device, or power source. It can result from an overload, short circuit, or ground fault. Circuit breakers and fuses detect excessive current and open the circuit to limit heat, equipment damage, and fire risk.
Power Factor is the ratio of useful working power to total electrical power supplied to an AC circuit. It's expressed as a number from 0 to 1, or as a percentage. A factor of 1.0 means power is used efficiently. While a lower value means current circulates without producing equivalent useful work.
Resistance is the opposition that an electrical material presents to current flow. Measured in ohms, resistance limits current and converts some electrical energy into heat. Wire length, conductor size, material, and temperature affect resistance. Electricians test resistance to find open circuits, damaged conductors, poor connections, and faulty components.
Surge Protector is a device that limits brief increases in electrical voltage and sends excess energy toward ground or another safe path. It helps protect connected equipment from transient surges caused by lightning, utility switching, or motor operation. A surge protector doesn't provide backup power and can't correct sustained overvoltage or wiring faults.
Transfer Switch is an electrical device that moves selected circuits between a normal utility supply and an alternate source, such as a portable or standby generator. The device prevents both power sources from connecting to the building at the same time. Transfer switches may operate manually or automatically. Depending on the system design.
Voltage Drop is the reduction in electrical pressure that occurs as current travels through a conductor, connection, or device. Resistance, wire length, current demand, and wire size affect the amount. Excessive voltage drop can cause dim lights, weak motor speed, overheating, nuisance tripping, or equipment failure.
Wire Gauge is a numerical system that describes the diameter of electrical wire conductors. In the American Wire Gauge system, smaller numbers mean larger conductors, while larger numbers mean smaller conductors. Gauge affects a wire’s current capacity, resistance, flexibility, and voltage drop, so the correct size must match the circuit load and installation conditions.
