Electric Service Glossary (A-Z)

This glossary is designed for frontline customer service agents, dispatchers, schedulers, warranty representatives, and electrical service coordinators. It covers residential and light commercial electrical systems, components, terminology, troubleshooting language, safety concepts, customer-facing phrases, and industry terms.

AC (Alternating Current): Electrical current that periodically changes direction and is the standard power supplied to homes and businesses.
AFCI (Arc Fault Circuit Interrupter): Safety device designed to detect dangerous electrical arcs and shut off power.
Amperage (Amps): Measurement of electrical current flow.
Ampacity: Maximum electrical current a conductor can safely carry.
Apprentice Electrician: Entry-level electrician working under supervision.
Arc Flash: Dangerous release of energy caused by an electrical fault.
Authority Having Jurisdiction (AHJ): Local official responsible for enforcing electrical codes and inspections.
Ballast: Device formerly used to regulate current in fluorescent lighting systems.
Bonding: Permanent connection of metallic parts to ensure electrical continuity.
Branch Circuit: Wiring extending from a breaker to outlets, fixtures, or equipment.
Breaker Panel: Electrical distribution panel containing circuit breakers.
Brownout: Temporary reduction in voltage levels.
Bus Bar: Conductive strip used for electrical power distribution.
Conductor: Material that allows electricity to flow, typically copper or aluminum.
Circuit: Complete electrical path allowing current flow.
Circuit Breaker: Automatic electrical safety switch protecting circuits from overloads and shorts.
Code Violation: Installation that does not meet current electrical regulations.
Current: Flow of electricity through a conductor.
Connector: Device used to join electrical conductors.
Dead Circuit: Circuit with no electrical power present.
Dedicated Circuit: Circuit serving only one appliance or piece of equipment.
Disconnect Switch: Device used to isolate electrical equipment from power.
Distribution Panel: Panel that distributes electrical power throughout a building.
Duplex Receptacle: Standard outlet containing two plug-in locations.
Electrical Load: Amount of power consumed by electrical equipment.
Electrical Panel: Main distribution point for building electrical circuits.
Electric Meter: Device used by utility companies to measure power consumption.
Emergency Service Call: High-priority service request involving safety concerns or complete power loss.
Extension Cord: Temporary power cord providing electricity away from fixed outlets.
Fault Current: Unintended electrical current resulting from a malfunction.
Feeder: Conductors carrying power from a service panel to a subpanel.
Fixture: Permanently installed electrical device such as a light.
Fuse: Safety device that interrupts electrical flow when excessive current occurs.
Flashing Lights: Common customer complaint indicating possible voltage or connection issues.
Generator: Equipment producing electrical power during utility outages.
GFCI (Ground Fault Circuit Interrupter): Safety device that protects against electrical shock.
Ground: Safety connection directing electrical faults safely into the earth.
Ground Rod: Metal rod installed in the earth for grounding purposes.
Hardwired: Equipment permanently connected to electrical wiring.
Harmonic Distortion: Distortion of electrical waveforms caused by certain equipment.
Hot Wire: Energized conductor carrying electrical power.
Horsepower (HP): Measurement used to describe motor output.
Insulator: Material that resists the flow of electricity.
Inspection: Evaluation by a qualified authority to verify code compliance.
Isolated Ground: Special grounding arrangement used for sensitive equipment.
Inverter: Device converting DC power into AC power.
Junction Box: Enclosure used to protect electrical connections.
Journeyman Electrician: Licensed electrician qualified to perform electrical work independently.
Kilowatt (kW): Unit of electrical power equal to 1,000 watts.
Kilowatt-Hour (kWh): Measurement of energy consumption used by utilities for billing.
Line Voltage: Standard operating voltage supplied to equipment.
Load Center: Another term for an electrical panel.
Load Calculation: Process used to determine electrical demand requirements.
Lockout/Tagout (LOTO): Safety procedure preventing accidental energization of equipment.
Main Breaker: Primary breaker controlling power to an entire electrical panel.
Main Service Panel: Central distribution point receiving utility power.
Megger Test: Test used to evaluate insulation resistance.
Meter Base: Housing that supports and connects an electric meter.
Multi-Meter: Diagnostic tool measuring voltage, current, and resistance.
National Electrical Code (NEC): Primary electrical safety standard used throughout the United States.
Neutral Wire: Conductor that returns electrical current to the source.
No Power: Customer complaint indicating complete electrical outage.
Ohm: Unit of electrical resistance.
Ohm's Law: Fundamental relationship between voltage, current, and resistance.
Open Circuit: Incomplete electrical path preventing current flow.
Outlet: Device providing access to electrical power.
Overcurrent: Electrical condition where current exceeds safe limits.
Overload: Excessive demand placed on a circuit.
Panel Upgrade: Replacement or expansion of existing electrical service equipment.
Phase: Distribution method of alternating current power.
Power Surge: Sudden increase in voltage.
Primary Service: Main utility electrical connection to a property.
Pull Box: Enclosure used to facilitate conductor installation.
Qualified Electrician: Individual possessing training and authorization to perform electrical work.
Quick Disconnect: Connector allowing rapid separation of electrical components.
Quoted Repair: Contractor's estimate for parts and labor.
Receptacle: Electrical outlet accepting plugs.
Resistance: Opposition to electrical current flow.
Residential Service: Electrical service provided to a home.
Retrofit: Upgrade of existing electrical equipment.
Risk of Shock: Safety concern involving possible electrical contact.
Service Call: Scheduled visit by an electrician.
Service Entrance: Equipment connecting utility power to a building.
Short Circuit: Unintended low-resistance connection causing excessive current flow.
Single-Phase Power: Common electrical service used in homes.
Smart Panel: Advanced panel capable of monitoring electrical usage.
Subpanel: Secondary electrical panel supplied from the main panel.
Surge Protector: Device protecting equipment from voltage spikes.
Switch Leg: Conductors connecting a switch to a controlled load.
Tamper-Resistant Receptacle: Safety outlet designed to prevent insertion of foreign objects.
Terminal: Connection point for electrical conductors.
Three-Phase Power: Electrical distribution method commonly used in commercial facilities.
Transformer: Device that changes voltage levels.
Trip: Protective shutdown of a circuit breaker.
Underground Service: Utility conductors installed below ground.
Underwriter Laboratories (UL): Organization that certifies product safety standards.
Utility Company: Organization supplying electrical power.
Variable Frequency Drive (VFD): Device controlling motor speed and operation.
Volt (V): Unit of electrical potential.
Voltage Drop: Reduction in voltage over conductor length.
Voltage Tester: Tool used to verify electrical presence.
Watt (W): Unit of electrical power.
Wire Gauge: Measurement of conductor size.
Wire Nut: Connector used to join electrical conductors.
Working Clearance: Required safety space around electrical equipment.
XHHW Wire: Common insulation type used for electrical conductors.
Xfmr: Industry abbreviation for transformer.
Yoke: Metal mounting frame supporting switches and receptacles.
Yellow Wire: Conductor color commonly used for switch legs or special applications.
Zero Voltage Condition: State where equipment has been fully de-energized.
Zinsco Panel: Older electrical panel brand frequently replaced due to safety concerns.
Zone Control: Electrical controls managing specific areas or systems independently.

Customer Service Phrases Frontline Agents Should Know

Partial Power Outage: Customer reports some areas have power while others do not.
Complete Power Loss: Entire property has no electrical service.
Breaker Keeps Tripping: Customer experiences repeated breaker shutdowns.
Burning Smell: Potential electrical safety issue requiring immediate attention.
Sparking Outlet: Outlet producing visible sparks when used.
Hot Panel: Electrical panel feels unusually warm or hot.
Flickering Lights: Lighting brightness fluctuates unexpectedly.
Dead Outlet: Outlet provides no power.
Power Surge Event: Customer reports equipment damage or sudden voltage spike.
Code Correction: Work required to bring installation into compliance.
Service Upgrade: Increase in electrical service capacity, such as from 100A to 200A.
Permit Required: Local authority approval needed before work begins.
Emergency Dispatch: Immediate technician response for hazardous conditions.
Load Evaluation: Assessment of electrical demand before equipment installation.
Recall Notice: Manufacturer notification regarding potentially defective equipment.
Warranty Service: Repair covered under an equipment or workmanship warranty.
Parts Availability: Current inventory status of required repair components.
Dispatch Window: Scheduled timeframe for technician arrival.
First-Time Fix Rate: Percentage of repairs completed during the first visit.