Despite the use of the term national it is not a federal law.
National electrical code branch circuits.
National electrical code nec 2011 the national electrical code nec 2011 provides guidance for electrical contractors and electricians but it is really intended for use by governmental agencies that have legal jurisdiction over electrical installations and authorized electrical and insurance inspectors the many mandatory chapters include chapter 2 wiring and protection chapter 3.
Most local codes are based on the national electrical code nec a document that lays out required practices for all aspects of residential and commercial electrical.
National electrical code multiwire branch circuit.
Electrical codes are in place to protect you the homeowner.
The national electrical code nec or nfpa 70 is a regionally adoptable standard for the safe installation of electrical wiring and equipment in the united states it is part of the national fire code series published by the national fire protection association nfpa a private trade association.