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Wikipedia - about electric business
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.
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
Lighting Garden
Electricians increasingly offer services for the repair of lighting installations in the garden. On the one hand this is due to the fact that more and more people are choosing to mount such an installation in your garden, because it is very convenient and effective solution. On the other hand, such installations are often exposed to changing weather conditions, and enters the installation of the smallest amount of, for example, rain can cause short circuits and failures. Therefore, help electricians primarily relies in this respect on the corresponding securing lighting systems, allowing users to enjoy long light without any failure.
Encyclopedically about IEC
The International Electrotechnical Commission (IEC; in French: Commission électrotechnique internationale) is a non-profit, non-governmental international standards organization that prepares and publishes International Standards for all electrical, electronic and related technologies ? collectively known as "electrotechnology". IEC standards cover a vast range of technologies from power generation, transmission and distribution to home appliances and office equipment, semiconductors, fibre optics, batteries, solar energy, nanotechnology and marine energy as well as many others. The IEC also manages three global conformity assessment systems that certify whether equipment, system or components conform to its International Standards.
The IEC charter embraces all electrotechnologies including energy production and distribution, electronics, magnetics and electromagnetics, electroacoustics, multimedia, telecommunication and medical technology, as well as associated general disciplines such as terminology and symbols, electromagnetic compatibility (by its Advisory Committee on Electromagnetic Compatibility, ACEC), measurement and performance, dependability, design and development, safety and the environment.
Źródło: https://en.wikipedia.org/wiki/International_Electrotechnical_Commission