| 释义 |
electrical codes National Electrical CodeA nationally accepted guide to the safe installation of wiring and equipment; not intended as a design specification but rather for the practical safeguarding of persons and of buildings and their contents from hazards arising from the use of electricity for heat, light, power, and other purposes. Provides rules, recommended by the National Fire Protection Association, governing the installation of interior electric wiring. These rules, subject to revision every three years, a standard of the National Board of Fire Underwriters, have been incorporated in many municipal ordinances; city or state regulations take precedence where they differ from the rules of the Code. |