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Building and Electrical Codes 51
U.S. Electrical Codes
Authorities on electrical codes:
■ National Electrical Code (NEC) Classification —
A recognized authority on safe electrical wiring.
U.S. Federal, state, and local governments use NEC
standards to establish their own laws, ordinances,
and codes on wiring specifications. The NEC
Classification is published by:
■ Underwriters’ Laboratories (UL) Listing —
An independent research and testing laboratory.
UL evaluates the performance and capability of
electrical wiring and equipment to determine
whether they meet certain safety standards when
properly used. Acceptance is usually indicated by
the words “UL Approved” or “UL Listed.”
UL
333 Pfingsten Road
Northbrook IL 60062-2096 USA
www.ul.com
■ National Electrical Manufacturers Association
(NEMA) — An organization of electrical product
manufacturers. Members develop consensus
standards for cables, wiring, and electrical
components.
NEMA
1300 North 17th Street, Suite 1847
Rosslyn VA 22209 USA
www.nema.org
■ Electronic Industries Association (EIA) — A trade
association that develops technical standards,
disseminates marketing data, and maintains
contact with government agencies in matters
relating to electronics and related industries.
EIA
2500 Wilson Boulevard
Arlington VA 22201-3834 USA
www.eia.org