Competency standards in the UK are defined by the Sector Skills council Summit Skills. Qualifications certificated by awarding organisations such as City and Guilds and EAL are based on these National Occupational Standards. Once qualified and demonstrating the required level of competence an Electrician can register with the JIB (Joint industry Board) for an Electrotechnical Certification Scheme (ECS) card. Electrical competence is required at Level 3 to practice as an electrician in the UK. The electrical industry is one of the few that require a trade test to be achieved prior to being fully qualified.
This is known as the AM2.Źródło: https://en.wikipedia.org/wiki/Electrician
At the beginning should be designed and adequately equipping workers with the necessary wiring and mounting items.
The installation itself mains also require supervision by a competent, highly qualified staff having qualified electrician.
During the installation of electrical systems at the construction site should remain authorized persons, regardless of whether they plan to put electrical installations in the home or in a big high-rise.In each place is a risk that there is a dangerous situation is the same.
Electric charge is the physical property of matter that causes it to experience a force when placed in an electromagnetic field.
There are two types of electric charges: positive and negative.Like charges repel and unlike attract. An object (one not made of antimatter) is negatively charged if it has an excess of electrons, and is otherwise positively charged or uncharged.
Electrically charged matter is influenced by, and produces, electromagnetic fields.The interaction between a moving charge and an electromagnetic field is the source of the electromagnetic force, which is one of the four fundamental forces (See also: magnetic field).Źródło: https://en.wikipedia.org/wiki/Electric_charge.