Electric current that periodically reverses direction.
A breaker that shuts off power when dangerous arcing is detected.
The maximum current a wire or device can safely carry.
Unit of electric current.
A sudden, explosive release of electrical energy from a fault.
Provides electricity during outages.
A device that regulates current in fluorescent or HID lights.
Batteries that store electricity for use later or during outages.
Electronics that protect and control rechargeable batteries.
Batteries that store electricity for later use.
A complete loss of power in an area.
Connecting metal parts together and to ground.
Wiring from the panel to outlets, lights, or appliances.
Main electric control center.
A drop in voltage that dims lights without a full outage.
A solid metal bar that distributes power inside panels.
An older energy‑saving bulb that uses a small fluorescent tube.
A support system for many cables in commercial spaces.
A property where components store electric charge in an electric field.
Stores electric energy.
Warns of dangerous CO gas.
Path for electric flow.
A resettable safety switch that stops electricity during problems.
Tool to find which breaker controls a circuit.
Measures current by clamping around a wire.
Energy‑saving lamp using fluorescent technology.
Carries electric current.
Protective tubing for electric wires.
Tool to bend metal conduit precisely.
A heavy‑duty switch controlled by a small signal.
Flow of electricity.
Electricity in one direction.
A high‑power station that charges EVs very quickly.
A circuit serving a single appliance or area.
A control that lets you adjust light brightness.
A switch that completely isolates equipment for service.
Thin‑wall metal conduit used to protect and route wires.
Equipment that safely charges an electric vehicle.
Equipment that recharges EV batteries.
Controls that balance EV charging with the building’s capacity.
The overall equipment set that delivers power to an EV.
Measures electricity use for billing.
Converts electric energy to motion.
A jolt of electricity passing through the body.
The network that delivers power from plants to users.
Lights that activate during outages.
A review to find efficiency improvements.
Using less electricity to get the same job done.
A device that tracks how much power your home or business uses.
Tracks real‑time energy use.
A label for products that meet high efficiency standards.
A flexible metal raceway used where movement is needed.
Wiring that carries power from a main panel to a subpanel or large load.
A flexible tool for pulling wires through spaces.
A common unit for measuring light at a surface.
How many times per second AC power oscillates.
Overload protection device.
A device that quickly cuts power if electricity takes an unsafe path.
Unintentional contact with ground.
A safety wire that carries fault current to ground.
Connecting parts of a system safely to the earth.
A metal rod driven into earth to dissipate fault current.
Permanently connected to building wiring.
Unwanted power wave distortions caused by certain loads.
Fixtures designed for tall ceilings like warehouses or gyms.
A setup that links smart devices for centralized control.
The wire that carries live power to devices.
Conduit stronger than EMT and lighter than RMC.
Overall opposition to AC flow, combining resistance and reactance.
A traditional bulb that glows by heating a filament.
A property where coils or wires resist changes in current.
Non‑conductive coating around wires.
Blocks electric flow.
A device that converts DC power to AC power for building use.
An enclosure where wires are joined and protected.
1000 watts of power.
A unit of electrical energy equal to using 1,000 watts for one hour.
Early wiring method found in old homes.
A highly efficient solid‑state light source.
Electronics that safely power LED fixtures.
A flexible, water‑resistant nonmetallic raceway.
An EV charger that uses a standard 120‑volt outlet.
120V EV charging using a standard outlet.
An EV charger that uses a 240‑volt circuit for faster charging.
240V EV charging for faster refills.
High‑power EV charging that uses DC directly.
A complete assembly that provides light.
A wall control that opens or closes a circuit to a light.
A metal rod that directs lightning safely to ground.
Power-consuming device.
Spreading electric demand evenly.
A safety procedure that locks equipment off during work.
Circuits operating at 50 volts or less.
Fixtures for medium‑height ceilings in shops or garages.
Wiring and devices that run at 50 volts or less.
A heavy‑duty connector for large wires.
A measure of total light output.
A measure of light level on a surface.
Armored cable used for extra protection, often commercial.
The master breaker controlling the whole panel.
