2026 NEC Road Map
In the 2026 NEC, this article is the main home for defined terms.
What is Article 100?
In an NEC rule, this word identifies a mandatory requirement.
What is shall?
These three letters identify electrical metallic tubing.
What is EMT?
Unused openings in a box need these suitable parts to restore the enclosure.
What are approved knockout closures or plugs?
Before using a 2026 NEC answer on an actual job, confirm this legally applicable code version and any local changes.
What is the locally adopted edition and amendments?
This 2026 NEC article contains general requirements for electrical installations.
What is Article 110?
This NEC phrase identifies an allowed optional or alternate method.
What is shall be permitted?
This fitting joins two straight pieces of EMT together.
What is a coupling?
A terminal is marked CU ONLY. This conductor metal is permitted at that terminal.
What is copper?
A breaker physically fits a panel. Before installing it, check this panel information rather than assuming physical fit proves suitability.
What is the panel labeling identifying permitted breaker types?
Branch-circuit, feeder, and service load calculations moved from Article 220 to this article in the 2026 NEC.
What is Article 120?
These explanatory paragraphs help explain NEC rules but are not themselves enforceable requirements.
What are informational notes? (90.5(C).)
This fitting secures the end of an EMT run to a box.
What is an EMT connector?
A lug lists 35 lb-in and the installer has a torque tool marked in lb-ft. This is the equivalent setting.
What is about 2.92 lb-ft? (35 / 12; use a tool suitable for that range.)
A contractor wants to bury a junction box behind finished drywall. The installation must preserve this ability to reach the wiring without removing building finish.
What is accessibility of the box?
Energy management systems, previously addressed in Article 750, are covered by this 2026 NEC article.
What is Article 130?
Before applying an NEC exception, you must confirm these stated limits apply to your installation.
What are all of the exception's conditions?
For a raceway-fill exercise, the allowed conductor area is 0.300 square inch and each identical conductor is 0.050 square inch. This is the maximum whole number that fits.
What is 6 conductors? (0.300 / 0.050.)
A 2026 NEC 300.4(C) inspection finds conductors damaged by fire. This is the required disposition.
What is replacement of the damaged conductors?
A machine label specifies a maximum 30-ampere overcurrent device. Installing a 40-ampere breaker would violate this equipment limit.
What is the marked maximum overcurrent protection rating?
In the 2026 NEC, general-use snap switches and dimmers join receptacles in this article covering wiring devices.
What is Article 406?
This organization, office, or individual is responsible for enforcing code requirements or approving equipment and installations.
What is the authority having jurisdiction (AHJ)?
A raceway-fill calculation passes. Before selecting conductors, you must also check this current-carrying capacity, including any required adjustment or correction.
What is conductor ampacity?
A device is listed only for dry locations but is specified for an exposed wet location. This is the proper resolution before installation.
What is obtain equipment listed and suitable for the wet location?
A 2026 NEC lookup gives a general rule, a specific equipment rule, and an applicable exception. This is the correct way to determine the installation requirement.
What is read the provisions together and apply the specific rule and only the exceptions whose conditions are met?