NFPA 70电气规范

NFPA 70 NATIONAL ELECTRICAL CODE?
NFPA 70 电气规范
 
90.2 Scope.
(A) Covered. This Code covers the installation of electrical conductors, equipment, and raceways; signaling and communications conductors, equipment, and raceways; and optical fiber cables and raceways for the following
(1) Public and private premises, including buildings, structures, mobile homes, recreational vehicles, and floating buildings
(2) Yards, lots, parking lots, carnivals, and industrial substations
(3) Installations of conductors and equipment that connect to the supply of electricity
(4) Installations used by the electric utility, such as office buildings, warehouses, garages, machine shops, and recreational buildings, that are not an integral part of a generating plant, substation, or control center.
(B) Not Covered. This Code does not cover the following
(1) Installations in ships, watercraft other than floating buildings, railway rolling stock, aircraft, or automotive vehicles other than mobile homes and recreational vehicles. FPN Although the scope of this Code indicates that the Code does not cover installations in ships, portions of this Code are incorporated by reference into Title 46, Code of Federal Regulations, Parts 110–113.
(2) Installations underground in mines and self-propelled mobile surface mining machinery and its attendant electrical trailing cable
(3) Installations of railways for generation, transformation, transmission, or distribution of power used exclusively for operation of rolling stock or installations used exclusively for signaling and communications purposes
(4) Installations of communications equipment under the exclusive control of communications utilities located outdoors or in building spaces used exclusively for such installations
(5) Installations under the exclusive control of an electric utility where such installations a. Consist of service drops or service laterals, and associated metering, or b. Are located in legally established easements or rights-of-way designated by or recognized by public service commissions, utility commissions, or other regulatory agencies having jurisdiction for such installations, or c. Are on property owned or leased by the electric utility for the purpose of communications, metering, generation, control, transformation, transmission, or distribution of electric energy. FPN to (4) and (5) Examples of utilities may include those entities that are typically designated or recognized by governmental law or regulation by public service/utility commissions and that install, operate, and maintain electric supply (such as generation, transmission, or distribution systems) or communication systems (such as telephone, CATV, Internet, satellite, or data services). Utilities may be subject to compliance with codes and standards covering their regulated activities as adopted under governmental law or regulation. Additional information can be found through consultation with the appropriate governmental bodies, such as state regulatory commissions, the Federal Energy Regulatory Commission, and the Federal Communications Commission.
(C) Special Permission. The authority having jurisdiction for enforcing this Code may grant exception for the installation of conductors and equipment that are not under the exclusive control of the electric utilities and are used to connect the electric utility supply system to the service-entrance conductors of the premises served, provided such installations are outside a building or terminate immediately inside a building wall.
 
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Adopted in all 50 states, NFPA 70? National Electrical Code has saved untold lives with comprehensive requirements for electrical wiring and equipment. When the Code advances to incorporate new technologies, you can’t afford to fall behind! You need the 2011 NEC to safeguard people and property, and avoid violations.
Major changes in the 2011 NEC meet consumer demand for alternate energy, green technologies, and IT equipment
·    New Article 694 has first-time requirements for small wind electric systems.
·    Revised Article 625 includes updates on safe battery charging for plug-in hybrid vehicles that reduce the risk of explosion.
·    Revised Article 705 covers interconnecting generators, windmills, and solar and fuel cells with other power supplies.
·    New Article 840 addresses the increased demand for broadband communications systems with requirements for wireless, routers, and wireless disconnects.
New requirements focused on workplace safety include
·    Means to reduce incident energy (240.87)
·    Labeling at subpanels to identify feeder supply source (408.4(B))
·    Disconnecting means for transformers (450.14)
Get first-time provisions on electrical installations over 600 volts.
New Article 399 incorporates requirements for overhead distribution systems for large electrical system users, such as school or business campus settings.
The Code's user-friendly format saves you time
·    Shading in NEC text makes changes easy to spot.
·    Vertical rules indicate additions.
·    Bullets show deletions.
·    Index includes identifiers at the top of every page to streamline research.
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 来源：防火网  发布时间：12/10/2013  点击次数：2788