GIES OS
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Indexed GIES field reference for article lookup, bookmarks, and local notes. Full NEC text is not bundled.
This section is an index and note layer only. Use your licensed 2020 NFPA 70 / NEC book, NFPA LiNK access, or AHJ-published adopted code source for exact enforceable text. Do not treat this page as the full code.
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Short GIES field cards are grouped directly in the code tab below. Use the full cards when you need the detailed bullet list, exceptions, and gotchas.
Open Full Quick Card LibraryLegacy Common CardsGrounding connects the system or equipment to earth; bonding establishes electrical continuity and an effective ground-fault current path. Exception/watch: Services,...
Other metal piping systems likely to become energized shall be bonded as required by 250.104(B). Exception/watch: CSST systems can have manufacturer instructions and...
If a metal underground water pipe qualifies as a grounding electrode, it shall be included in the grounding electrode system. Exception/watch: Electrode qualification depends...
All grounding electrodes described in 250.52(A)(1) through (A)(7) that are present at a building or structure shall be bonded together to form the grounding electrode system....
The grounded service conductor shall be connected to the grounding electrode system as required by 250.24. Exception/watch: Existing installations and separately derived...
Separately derived alternating-current systems shall be grounded and bonded in accordance with 250.30 where required. Exception/watch: Some systems are not separately derived...
Equipment grounding conductors shall be sized in accordance with 250.122 and the rating or setting of the circuit overcurrent device, subject to the article rules....
A grounding electrode conductor shall be installed in one continuous length without a splice or joint except as permitted by 250.64(C). Exception/watch: The rule contains...
General installation requirements, listing/labeling, working space, conductor terminations, equipment markings, and workmanship.
Keywords: working space, listing, labeling, torque, termination, 110.26, equipment space
Related: 100, 250
Grounded conductor identification, white/gray rules, and neutral conductor field identification issues.
Keywords: neutral, grounded conductor, white wire, gray wire, identification
Related: 210, 215, 250
Core branch-circuit rules for outlets, receptacles, required circuits, GFCI/AFCI references, and dwelling/commercial branch work.
Keywords: branch circuit, receptacle, GFCI, AFCI, small appliance, laundry, bathroom, garage, 210.8, 210.12, 210.52
Related: 220, 250, 406
Feeder sizing, ratings, voltage drop informational notes, and feeder identification in service/subpanel work.
Keywords: feeder, subpanel, ampacity, voltage drop, neutral
Related: 220, 225, 230, 250
Outside feeders/branch circuits, building disconnect rules, and detached structure feeds.
Keywords: detached garage, outside feeder, building disconnect, overhead, underground
Related: 215, 230, 250
Service conductors, service disconnecting means, service equipment, service entrance rules, and common utility/service work references.
Keywords: service, service disconnect, service equipment, meter, service entrance, 230.71
Related: 225, 250, 408
Surge protective devices and overvoltage protection requirements.
Keywords: surge, SPD, overvoltage
Related: 230, 250, 285
Grounding electrode systems, bonding, equipment grounding conductors, grounded conductors, and service/subpanel grounding logic.
Keywords: grounding, bonding, GEC, EGC, ground rod, water pipe, gas bonding, subpanel, 250.66, 250.122
Related: 100, 110, 200, 230, 680
SPD installation, connection, and application references.
Keywords: surge protective device, SPD, transient voltage
Related: 242, 230, 250
Receptacle ratings, replacement rules, tamper resistance, weather resistance, grounding-type devices, and device applications.
Keywords: receptacle, outlet, NEMA, tamper resistant, weather resistant, WR, TR
Related: 210, 250, 422
Generator installation, marking, disconnecting means, and wiring references.
Keywords: generator, genset, standby, portable generator
Related: 250, 700, 701, 702
Transformer installation, ventilation, overcurrent protection, and vault references.
Keywords: transformer, dry type, vault, primary, secondary
Related: 240, 250
Agricultural building wiring, equipotential planes, corrosive/dusty/wet conditions.
Keywords: agricultural, barn, livestock, equipotential plane
Related: 250, 300
Dock and marina power, GFCI/GFPE, shore power, corrosion/wet location concerns.
Keywords: marina, dock, boat, shore power
Related: 250, 682
EV charging equipment, branch circuits, load management, GFCI references, and installation rules.
Keywords: EV, EVSE, charger, electric vehicle
Related: 210, 220, 250
Pool bonding, GFCI, equipment grounding, wet niche fixtures, fountains, and related installations.
Keywords: pool, hot tub, spa, fountain, bonding, equipotential
Related: 250, 555