Electrical contractors are generally classified by three major types of work performed. "Outside" or "line" contractors are responsible for high-voltage power transmission and distribution lines.Line contractors build and maintain the infrastructure required to transport electricity generated at a power plant through a series of high-voltage lines and substations before it is used to power facilities, buildings, and homes. "Inside" electrical contractors provide electricity to any structure within a property?s boundary lines, including outdoor lighting or substations.
Under current construction specification guidelines, "inside" electrical contractors can serve as prime contractors for all electrical and cabling design, installation, and maintenance for commercial, institutional, and residential buildings.Projects also include Database Centers/Infrastructure and Pharmaceutical Work. "Integrated building systems" (IBS) or "Voice/Data/Video" (VDV) electrical contractors work primarily with low-voltage installations such as back-up power, climate controls, wireless networks, energy-efficient lighting, telecommunications, fiber optics, and security systems. IBS contractors are particularly skilled at integrating these system controls to work together for maximum energy efficiency and building performance.
It is a profession of high risk and therefore must have the expertise to carry it out.In the absence of skills and knowledge of repair system can lead to severe injury or even a real tragedy..