EV Charger Electrical Terms and Glossary for Georgia

Georgia property owners, contractors, and fleet managers navigating EV charger installations encounter a dense layer of electrical terminology that governs every permitting decision, equipment selection, and inspection outcome. This glossary defines the core terms used across residential, commercial, and multi-unit EV charging contexts in Georgia, with reference to the National Electrical Code (NEC), Georgia State Minimum Standard Electrical Code, and relevant equipment classifications. Precise understanding of these terms reduces permit rejections, supports accurate load calculations, and clarifies communication between property owners and licensed electrical contractors.

Definition and scope

EV charger electrical terminology encompasses the technical vocabulary used by engineers, inspectors, utility representatives, and contractors to specify, install, and verify electric vehicle supply equipment (EVSE) in Georgia. The Georgia State Minimum Standard Electrical Code adopts the NEC (National Fire Protection Association, NFPA 70) as its foundational document, which means definitions established in NEC Article 625 (Electric Vehicle Power Transfer System) carry direct regulatory weight in Georgia permit reviews. Terms related to voltage, amperage, circuit classification, grounding, and equipment ratings all appear in permit applications, inspection checklists such as the Georgia EV Charging Electrical Inspection Checklist, and utility interconnection agreements with Georgia Power.

Scope of this glossary: This reference covers terminology applicable to EV charging electrical systems within Georgia's jurisdiction, including single-family residential, commercial, workplace, and multi-unit dwelling installations. It draws on the NEC, the Georgia State Minimum Standard Electrical Code administered by the Georgia Secretary of State's Construction Industry Licensing Board, and interconnection requirements published by Georgia Power.

Not covered: Federal regulatory frameworks such as those administered by the Federal Energy Regulatory Commission (FERC) fall outside this page's scope. Interstate utility grid standards, federal fleet mandates, and tax credit administration by the IRS are not covered here. Content specific to one installation type — such as DC Fast Charger Electrical Infrastructure in Georgia — appears in dedicated pages rather than in this general glossary.

How it works

Electrical terminology in the EVSE context functions as a shared reference language across three distinct regulatory layers: the national code body (NFPA), the state code adoption authority, and the local Authority Having Jurisdiction (AHJ). When a contractor submits a permit for a Level 2 charger installation, every line item on the application — circuit ampacity, conductor size, GFCI protection class, breaker rating — maps to a defined term in the NEC or in published utility tariff documentation.

Core term definitions:

1. EVSE (Electric Vehicle Supply Equipment): Defined in NEC Article 625.2 as the conductors, including the ungrounded, grounded, and equipment grounding conductors, and the electric vehicle connectors, attachment plugs, and all other fittings, devices, power outlets, or apparatus installed specifically for the purpose of transferring energy between the premises wiring and the electric vehicle.

2. Level 1 Charging: 120-volt, single-phase AC supply, typically drawing 12 to 16 amperes on a standard 15- or 20-ampere branch circuit. Delivers approximately 3 to 5 miles of range per hour of charging.

3. Level 2 Charging: 208- or 240-volt, single-phase (or three-phase in commercial settings) AC supply. Most residential Level 2 units draw 32 to 48 amperes on a dedicated 40- to 60-ampere branch circuit. Delivers approximately 10 to 30 miles of range per hour. See Level 2 EV Charger Wiring in Georgia for wiring method specifics.

4. DC Fast Charging (DCFC): Direct current supply delivered at 480 volts or higher, drawing 60 to 500 amperes depending on power level. Requires three-phase service infrastructure. Further detailed at Three-Phase Power for EV Charging in Georgia.

5. Dedicated Circuit: A branch circuit that serves no other load. NEC Article 625.40 requires that EVSE be supplied by a separate branch circuit with no other outlets. See Dedicated Circuit for EV Charger in Georgia.

6. Ampacity: The maximum current, in amperes, that a conductor can carry continuously under conditions of use without exceeding its temperature rating. Defined in NEC Article 100. Conductor ampacity must exceed the continuous load by at least 125%, per NEC Section 210.19(A)(1).

7. Branch Circuit: The circuit conductors between the final overcurrent device protecting the circuit and the outlet(s). Breaker sizing for EV circuits is addressed at EV Charger Breaker Sizing in Georgia.

8. Ground Fault Circuit Interrupter (GFCI): A device that interrupts the flow of electric current when a ground fault of 4 to 6 milliamperes is detected. NEC Section 625.54 requires GFCI protection for all EVSE installed in dwelling unit locations. See GFCI Protection for EV Chargers in Georgia.

9. Equipment Grounding Conductor (EGC): The conductive path installed to connect normally non-current-carrying metal parts of equipment to the grounded conductor, the grounding electrode conductor, or both. Critical to EVSE safety; see EV Charger Grounding and Bonding in Georgia.

10. Load Calculation: A systematic process for determining the total electrical demand of a structure's circuits, required before panel upgrades or new service installations. Georgia permit offices require load calculations for EVSE additions; see Georgia EV Charger Load Calculation.

11. Demand Management / Load Management: Control strategies that reduce peak electrical demand, including time-of-use scheduling and smart charging protocols. Addressed at EV Charging Electrical Demand Management in Georgia.

12. Conduit: A raceway — rigid metal (RMC), intermediate metal (IMC), rigid PVC, or electrical metallic tubing (EMT) — used to enclose and protect conductors. Conduit selection for EVSE is detailed at EV Charger Conduit and Wiring Methods in Georgia.

13. Service Panel / Electrical Panel: The main distribution board receiving utility power and distributing it to branch circuits. Capacity limits often necessitate upgrades for EVSE additions; see Panel Upgrade for EV Charging in Georgia.

14. Interconnection Agreement: A utility-customer contract governing the connection of customer-owned equipment, including EVSE and solar-paired charging systems, to the utility grid. Georgia Power's interconnection process is relevant for installations exceeding standard service capacity; see Georgia Power Utility EV Charger Interconnection.

15. Authority Having Jurisdiction (AHJ): The organization, office, or individual responsible for enforcing applicable codes. In Georgia, AHJs are typically county or municipal building departments. Their inspection criteria govern final approval of EVSE installations.

16. Raceway: An enclosed channel for conductors. Includes conduit, cable tray, and wireways. Raceway fill limits are specified in NEC Chapter 9.

17. Voltage Drop: The reduction in voltage along a conductor due to resistance. NEC Informational Note to Section 210.19 recommends limiting voltage drop to 3% on branch circuits and 5% overall. Excessive voltage drop reduces EVSE efficiency and charging speed.

18. Smart EVSE: Chargers equipped with communication protocols (e.g., OCPP, SAE J1772, ISO 15118) enabling remote monitoring, scheduling, and load management. See Smart EV Charger Electrical Integration in Georgia.

For a broader operational view of how these components interact within Georgia's electrical infrastructure, the conceptual overview of Georgia electrical systems provides system-level context.

Common scenarios

Residential single-family installation: A homeowner installing a 48-ampere Level 2 charger encounters terms including dedicated circuit, GFCI protection, conduit type (typically EMT in garages), ampacity (conductor must be rated at 60 amperes minimum per the 125% continuous load rule), and panel capacity. If the existing panel lacks capacity, a panel upgrade triggers a new load calculation and permit. Full installation context appears at Residential EV Charger Electrical Installation in Georgia.

Commercial parking structure: A property manager adding 10 Level 2 stations encounters demand management terminology, three-phase service considerations, and metering requirements per Georgia Power tariff schedules. Multi-unit dwelling terminology overlaps substantially; see Multi-Unit Dwelling EV Charging Electrical in Georgia.

Solar-paired system: A property owner integrating photovoltaic generation with EVSE must understand interconnection requirements, bidirectional metering, and load calculation adjustments. Relevant terminology appears at Solar EV Charger Electrical Systems in Georgia and Battery Storage EV Charger Electrical in Georgia.

Workplace fleet charging: Employers installing charging for 20 or more vehicles