GENERAL REQUIREMENTS
When considering the overarching intent of the NEC as it applies to installation practices, this section emphasizes practical safeguarding rather than efficiency or convenience.
What is 90.1(A)?
When sizing branch-circuit conductors supplying continuous loads, the ampacity must not be less than this percentage of the load.
What is 125%? (210.19(A)(1))
Marinas and boatyards fall under this NEC article.
What is Article 555?
Panelboards used for lighting and appliance branch circuits are covered under this article.
What is Article 408?
Continuous loads must be calculated at this percentage when sizing feeders.
What is 125%? (215.2(A)(1))
In a typical premises wiring system, the conductor that is intentionally grounded and commonly identified by white or gray insulation serves this function under normal operation.
What is the Grounded Conductor? (Art. 100 / 200.6)
Where more than three current-carrying conductors are installed together, ampacity adjustment is required by this section.
What is 310.15(C)(1)?
Mobile homes and manufactured housing electrical requirements are found here.
What is Article 550?
Transformers and their installation requirements are covered here.
What is Article 450?
Dwelling unit load calculations are primarily covered in this article.
What is Article 220?
Where electrical equipment is required to be installed in a professional and skillful manner, this section provides that requirement.
What is 110.12?
In order to prevent damage where cables pass through framing members, this section requires protection.
What is 300.4?
Temporary installations for construction sites must comply with this article.
What is Article 590?
Motors, motor circuits, and controllers fall under this article
What is Article 430?
Demand factors for general lighting loads are found in this section.
What is 220.42?
In determining whether equipment is acceptable for installation, this authority has final approval.
What is the Authority Having Jurisdiction? (Art. 100)
Flexible cords and cables are generally restricted by this article unless specifically permitted.
What is Article 400?
Healthcare facilities wiring methods and grounding requirements are governed by this article.
What is Article 517?
Air-conditioning equipment requirements are found in this article
What is Article 440?
Service conductors must be sized according to this article.
What is Article 230?
Where working space about electrical equipment is required, this section governs minimum clearances.
What is 110.26?
Overcurrent devices must be capable of opening a circuit automatically under overload or fault conditions as defined here.
What is Article 100?
Locations where flammable gases or vapors are present fall under this classification system.
What is Class I? (500.5)
Generators are covered under this article.
What is Article 445?
Grounding and bonding requirements are comprehensively covered in this article.
What is Article 250?