National Electrical Code 2011 Handbook by (NFPA) National Fire Protection Association

By (NFPA) National Fire Protection Association

Secure, effective, code-compliant electric installations are made uncomplicated with the newest booklet of this generally well known source. Like its hugely winning prior versions, the NEC 2011 guide combines stable, thorough, research-based content material with the instruments you want to construct an in-depth figuring out of crucial themes. It offers the entire textual content of the up to date code laws along professional remark from code experts, delivering code motive, clarifications for brand spanking new and up to date ideas, and useful, real-world recommendation on the right way to observe the code. New to the 2011 version are articles together with first-time Article 399 on October, Overhead Conductors with over six hundred volts, first-time Article 694 on Small Wind electrical platforms, first-time Article 840 on Premises Powered Broadband Communications structures, and extra. This successful blend has created a worthwhile reference for these in or coming into careers in electric layout, deploy, inspection, and security.

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Example text

Intersystem Bonding Termination. A device that provides a means for connecting bonding conductors for communications systems to the grounding electrode system. 2. 7 regarding the examination of equipment for safety. Listing or labeling by a qualified testing laboratory provides a basis for approval. Lighting Outlet. An outlet intended for the direct connection of a lampholder or luminaire. 29 Article 100 Listed. Equipment, materials, or services included in a list published by an organization that is acceptable to the authority having jurisdiction and concerned with evaluation of products or services, that maintains periodic inspection of production of listed equipment or materials or periodic evaluation of services, and whose listing states that either the equipment, material, or service meets appropriate designated standards or has been tested and found suitable for a specified purpose.

An assembly of one or more enclosed sections having a common power bus and principally containing motor control units. Multioutlet Assembly. A type of surface, flush, or freestanding raceway designed to hold conductors and receptacles, assembled in the field or at the factory. The definition of multioutlet assembly includes a reference to a freestanding assembly with multiple outlets, commonly called a power pole. In dry locations, metallic and nonmetallic multioutlet assemblies are permitted; however, they are not permitted to be installed if concealed.

24(A) requires that overcurrent devices be so located as to be readily accessible. 3 shows an example of a locked electrical equipment door with a warning sign that restricts access. Ampacity. The maximum current, in amperes, that a conductor can carry continuously under the conditions of use without exceeding its temperature rating. The definition of the term ampacity states that the maximum current a conductor carries continuously varies with the conditions of use as well as with the temperature rating of the conductor insulation.

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