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 CardsGeneral wiring method rules: protection, securing/support, boxes, raceways, wet locations, and underground basics.
Keywords: wiring method, raceway, cable, support, secure, wet location, underground
Related: 310, 314, 358, 352
Conductor ampacity, insulation types, temperature ratings, and adjustment/correction references.
Keywords: ampacity, conductor, THHN, THWN, temperature, 310.16, derating
Related: 240, 300, 334
Box fill, pull boxes, junction boxes, device boxes, conduit bodies, and handholes.
Keywords: box fill, junction box, pull box, device box, conduit body, 314.16
Related: 300, 370, Chapter 9
AC cable rules and limitations.
Keywords: AC cable, armored cable
Related: 300, 330
MC cable installation rules, uses, support, and limitations.
Keywords: MC cable, metal clad, support
Related: 300, 320, 334
NM-B rules for residential and light commercial contexts, protection, securing, and permitted uses.
Keywords: NM-B, Romex, nonmetallic sheathed cable, dwelling, support
Related: 300, 310, 320
PVC conduit installation, expansion, underground, sunlight, and support references.
Keywords: PVC, schedule 40, schedule 80, underground, expansion fitting
Related: 300, 355, 358
EMT installation, support, fittings, bends, corrosion protection, and common commercial raceway work.
Keywords: EMT, thinwall, conduit, support, strap, coupling, connector
Related: 300, 344, 352
Cable tray installation, support, and permitted cable types.
Keywords: cable tray, tray cable, industrial
Related: 300, 336
Agricultural building wiring, equipotential planes, corrosive/dusty/wet conditions.
Keywords: agricultural, barn, livestock, equipotential plane
Related: 250, 300
Conduit fill, conductor properties, resistance/reactance, and table-based calculations. Use exact NEC tables for final values.
Keywords: conduit fill, wire fill, table 1, table 4, table 5, resistance, reactance
Related: 300, 310, 314
Annex fill tables for raceway/conductor combinations. Informational; verify against adopted NEC usage.
Keywords: Annex C, fill table, conduit fill, EMT fill, PVC fill
Related: Chapter 9, 300