Wires and their colours
To enable wires to be easily and safely identified, all common wiring safety codes mandate a colour scheme for the insulation on power conductors. In a typical electrical code, some colour-coding is mandatory, while some may be optional. Many local rules and exceptions exist per country, state or region. Older installations vary in colour codes, and colours may fade with insulation exposure to heat, light and ageing.
As of March 2011, the European Committee for Electrotechnical Standardization (CENELEC) requires the use of green/yellow colour cables as protective conductors, blue as neutral conductors and brown as single-phase conductors. The United States National Electrical Code requires a green or green/yellow protective conductor, a white or grey neutral, and a black single phase.
The United Kingdom requires the use of wire covered with green insulation, to be marked with a prominent yellow stripe, for safe earthing (grounding) connections. This growing international standard was adopted for its distinctive appearance, to reduce the likelihood of dangerous confusion of safety earthing (grounding) wires with other electrical functions, especially by persons affected by red-green colour blindness.
In the UK, phases could be identified as being live by using coloured indicator lights: red, yellow and blue. The new cable colours of brown, black and grey do not lend themselves to coloured indicators. For this reason, three-phase control panels will often use indicator lights of the old colours.
Employment after completing education equipment
The demand for skilled workers who know the electricity is really big. Missing persons authorized to practice this profession, and someone really well knowledgeable has a very tight work schedule. Education Profile electrician does not enjoy the usual popular, so people who finish this course can count on quick employment. Of course, in this profession you need incredible accuracy and precision and patience and the desire to continue learning, because the people who have just completed their education in this field do not yet have a full picture of the situation and self-repair is not possible and you first have to take internships or practice under an experienced electrician.
Education in the technical profile electric
Technical profile electrician certainly is much less likely to be selected than other specialties, such as construction. 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.