First of all, you must have the appropriate skills in the field of electrical engineering.
You must also have knowledge typically technical, that is how laid the cables, where assembled the so-called cans, and how spread out the electrical system, if we consider the whole house.
That is where there is the greatest danger, and to correctly assemble the installation you have to have not only knowledge but also experience.
An electrical contractor is a business person or firm that performs specialized construction work related to the design, installation, and maintenance of electrical systems?a $130 billion industry in the United States.1 An electrical contractor is different from an electrician; an electrician is an individual tradesman and an electrical contractor is a business person or company that employs electricians. Both usually hold licenses and insurances to properly and safely operate a business, protecting the employees and home owners/business owners from insurance liabilities.These requirements vary from state to state.Electricians may work for an electrical contractor, or directly for individuals or companies.Źródło: https://en.wikipedia.org/wiki/Electrical_contractor
At the appropriate time work is carried out in respect of manual excavation in which the wires are subsequently stacked.Then, when the walls have been rebuilt there is a need to distribute the system throughout the house.
He then are assembled separately, and all kinds of electrical outlets, of which the inhabitants of the house will later use.
Of course, they are responsible for bringing the electrical system to the possibility of exploitation.Often electricians are also involved in installing electrical systems, such as intercom systems, which are quite useful, especially when dealing with a compact architecture..