This is because the vocational subjects, where young people learn from this direction are much more difficult, since they concern the often incomprehensible for youth affairs physical and mechanical properties.
However, anyone interested in this field and who want to learn a profession electrician certainly can handle, if studied systematically.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.
An electrical code is a set of regulations for electrical wiring.
Ways in which electrical codes ensure safety include ways to prevent (or mitigate) short circuits, ground faults, and overheating from inadequate current-carrying capacity (ampacity).Appropriately rated fuses or circuit breakers are used to interrupt a circuit loop whose ampacity is exceeded to avoid overheating of wires or other fixtures. Electrical codes are usually devised by national or international technical organizations, and adopted as law to make them enforceable.
See the following: DIN VDE (German Institute for Standardization) published by DIN-Norms is used in Germany National Electrical Code has been adopted for electrical wiring in the United States and for Mexico, Costa Rica, Venezuela and Colombia IEC 60364 is used as a basis for electrical codes in many European countries Canadian Electrical Code published by the CSA is used in Canada (see Electrical wiring in North America). British Standard BS 7671 is the set of regulations for electrical wiring in the United Kingdom. Australian/New Zealand Standard AS/NZS 3000:2007 Wiring Rules is used in Australia and New Zealand. NF C 15-100 (fr) is used for low voltage installations in France RGIE (fr) (Réglement Général sur les Installations Électriques) is used for installations in Belgium. AREI (nl) (Algemeen Reglement Elektrische Installaties) is used for installations in Flanders, Belgium. Źródło: https://en.wikipedia.org/wiki/Electrical_code
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.Źródło: https://en.wikipedia.org/wiki/Electrical_wiring