Electrical contractors are generally classified by the type of electrical work they do.
- “Outside” or “line” contractors are responsible for high-voltage power transmission and distribution lines. Line contractors see that the electricity generated at a power plant is carefully carried through a series of high-voltage lines and substations before it is used to power any facilities, buildings, or homes.
- “Inside” electrical contractors provide electricity to any structure within a property’s boundary lines, including outdoor lighting or substations. These electrical contractors can serve as prime contractors for all electrical and cabling design, installation, and maintenances for commercial, institutional, and residential buildings.
- “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. Low-voltage contractors ensure that these system controls work together for maximum energy efficiency and building performance.
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