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 CardsConductors shall have ampacity sufficient for the load after required adjustment and correction factors are applied. Exception/watch: Specific equipment articles,...
Breaker/fuse protection rules, standard ratings, tap conductors, conductor protection, and equipment protection.
Keywords: breaker, fuse, OCP, overcurrent, tap conductor, 240.4, 240.6
Related: 310, 408, 430
General 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
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
SE/USE cable applications for service and feeder work.
Keywords: SE cable, USE cable, service entrance
Related: 230, 310, 334
Welder circuits, conductor sizing, duty cycle, and OCP references.
Keywords: welder, welding, duty cycle
Related: 240, 310
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