TECHNICAL GUIDE
TABLE OF CONTENTS:
2. Definitions of Oversight or Regulating Bodies
3. Related Code
4. NEMA Ratings and IP Ratings
5. UL Hazardous Locations Definitions
8. Temperature Conversion Chart
CSA
(Canadian Standards Association) –
The Canadian Standards Association Performs a function for manufacturers similar
to that performed in the USA by Underwriters Laboratory Inc. (UL).
CSA develops standards for electrical products that parallel UL standards
in many aspects but are not always identical.
CSA tests products and grants paying clients “Certification” that
their products meet CSA standards.
IEC (The
International Electrotechnical Commission)
- The International Electrotechnical Commission is a worldwide standards
organization having 43 member countries. The
United States is active in many areas of the IEC and the standards it develops.
Sponsorship of the U.S. effort on the IEC is by the American National
Standards Institute (ANSI), coordinated by the United States National Committee
of the IEC (USNC). The IEC produces
many standards covering all aspects of the electrical and electronic industry. IEC standards are accepted in whole or in part by many
countries around the world.
NEC
(National Electric Code) – A
document which basically describes recommended safe practice for the
installation of all types of electrical equipment.
The NEC is not a “legal document” unless it is so designated by a
municipality as its own statute for safe electrical installations.
It is revised and published every three years. The NEC is “national” only in the fact that it is the
only document of which all or part is accepted by all states as an electrical
guide. It is the only document of
its kind written with national input supplied by twenty “panels” of advisors
containing several hundred experts in the electrical field from all parts of the
country. The sponsoring agency of
the NEC is the National Fire Protection Agency (NFPA).
NEMA
(The National Electrical Manufacturers Association)
– An organization of manufacturers of electrical equipment, including, but not
limited to, wiring devices, wire and cable, conduit, load centers, pressure wire
connectors, circuit breakers, fuses, etc.. NEMA is the “voice” of the electrical industry, and
through its standards, electrical products are formulated.
Generally these standards promote interchangeability between products of
one manufacturer with like products made by another manufacturer.
In some cases, standards relating to product “performance” are also
formulated by NEMA but these are the exception rather than the rule.
NEMA standards certainly are not compulsory, but generally they are
accepted by those manufacturers that help to write them as a way of making their
products more saleable and acceptable. NEMA
standards are utilized by many consumers in writing specifications for the
materials they purchase.
UL
(Underwriters Laboratories, Inc.) –
A non-profit corporation, operating as a testing facility and a developer of
safety standards. By its own
definition, Underwriters Laboratories defines itself as follows: “Underwriters
Laboratories Inc. founded in 1894, is chartered as a not-for-profit organization
without capital stock, under the laws of the state of Delaware to establish,
maintain, and operate laboratories for the examination and testing of devices,
systems and materials to determine their relation to hazards to life and
property”.
UL
tests products for paying “clients” and if the product submitted passes the
requirements of the UL standard for which it is submitted, a UL “Listing” is
granted which allows the manufacturer to use the UL manifest or “Label” on
its products. It is important to
remember that UL is not an approval agency.
It approves nothing, but merely lists a product as meeting minimum
standards for safety. The
Underwriters "Listing” mark on a product is generally accepted by the
public and government agencies as evidence of a “safe” product, not
necessarily a “quality” product.