nec is published every 3 years 2011,2008 and so on
Follow national and international standards and codes.
You can obtain a copy of local electrical codes from your city or county's building department, or online through their website. Additionally, you can visit the National Fire Protection Association (NFPA) website for access to the National Electrical Code (NEC), which serves as a model code for electrical work across the United States.
In the USA, the National Electrical Code is NFPA 70. There are several national fire codes, including National Fire Code (also called Uniform Fire Code); NFPA 1 (National Fire Protection Association) and the International Fire Code (International Code Council). Each of these references hundreds of other codes and standards, including Life Safety Code, Building Code, Electrical Code, etc.
Electrical codes or the NFPA70 and the standers for electrical work and are in place to protected the public from bad wiring that can cause fire's and other hazards
In the United States the National Electrical Code, or NEC, is the standard for most electrical installations. It is a document prepared by the National Fire Protection Association which is not a government organization. The NEC becomes a set of government requirements when a government entity, often a city or county, adopts the NEC as its standard.
This is the electrical code book used in the United States of America. Rules set out for electricians to use, to keep all electrical installations the same for all jurisdictions throughout the country. Different regions will have addendum's additional to the code to cover different regional climates and conditions.
The National Electrical Code does not specifically address whether you can have power outlets on a 2-hour fire-rated wall. However, you should consult with a qualified electrician to ensure that any electrical work done on a fire-rated wall complies with local building codes and fire safety regulations.
look at the question : "what are meez codes for 2010"
National Electrical Contractors Association was created in 1901.
National Association of Electrical Distributors was created in 1908.
what are the codes
These industries have their own special codes that take into account the different physical conditions in trains and ships.