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2020 NEC Code Reference

Indexed GIES field reference for article lookup, bookmarks, and local notes. Full NEC text is not bundled.

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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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Code Quick Cards

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.

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Chapter 2 - Wiring and Protection

1
Dedicated Equipment Space
Ref: 110.26(E) · dedicated space, panelboard, foreign systems

Indoor switchboards, switchgear, panelboards, and motor control centers shall have dedicated equipment space as required by 110.26(E). Exception/watch: Suspended ceilings...

General Field Reference

3
Termination Temperature Limits
Ref: 110.14(C) · termination, 75C, 60C, 90C

Conductor ampacity shall be based on the temperature rating of the termination as required by 110.14(C). Exception/watch: Listed equipment identified for other conductor...

Electrical Working Space
Ref: 110.26 · working space, clearance, 110.26

Working space about electrical equipment shall be provided and maintained to permit ready and safe operation and maintenance. Exception/watch: Special installations and...

Arc-Flash / Equipment Marking Reminder
Ref: 110.16 · arc flash, warning label, marking

Electrical equipment identified by 110.16 shall be field or factory marked to warn qualified persons of potential electric arc-flash hazards. Exception/watch: The NEC...

Chapter 1 - General

2
Article 100 - Definitions
Chapter 1 - General · General

Primary definitions used across the Code. Start here when a term drives the answer.

Keywords: definitions, qualified person, readily accessible, continuous load, grounded, bonding

Related: 110

Article 110 - Requirements for Electrical Installations
Chapter 1 - General · General

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

Chapter 2 - Wiring and Protection

1
Article 250 - Grounding and Bonding
Chapter 2 - Wiring and Protection · Grounding / Bonding

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

Chapter 4 - Equipment for General Use

2
Article 408 - Switchboards, Switchgear, and Panelboards
Chapter 4 - Equipment for General Use · Panels / Gear

Panelboards, switchboards, switchgear, circuit directories, unused openings, and panel equipment rules.

Keywords: panelboard, switchgear, switchboard, directory, breaker, unused opening

Related: 110, 230, 240

Article 490 - Equipment Over 1000 Volts, Nominal
Chapter 4 - Equipment for General Use · Medium Voltage

Medium-voltage equipment rules and references.

Keywords: medium voltage, over 1000V, MV

Related: 110, 240