On the other hand, many electricians have daily contact with electrical installations retains fewer and fewer safety work and then can easily lead to tragedy.
Completion of such a school is crowned with theoretical and practical exam, which entitles you to perform electrical services, such as installation and repair of the system.
Wiring safety codes are intended to protect people and property from electrical shock and fire hazards. Regulations may be established by city, county, provincial/state or national legislation, usually by adopting a model code (with or without local amendments) produced by a technical standards-setting organisation, or by a national standard electrical code. Electrical codes arose in the 1880s with the commercial introduction of electrical power. Many conflicting standards existed for the selection of wire sizes and other design rules for electrical installations. The first electrical codes in the United States originated in New York in 1881 to regulate installations of electric lighting..Since 1897 the US National Fire Protection Association, a private non-profit association formed by insurance companies, has published the National Electrical Code (NEC).States, counties or cities often include the NEC in their local building codes by reference along with local differences. The NEC is modified every three years.It is a consensus code considering suggestions from interested parties.
The proposals are studied by committees of engineers, tradesmen, manufacturer representatives, fire fighters and other invitees.Å¹rÃ³dÅ‚o: https://en.wikipedia.org/wiki/Electrical_wiring