Other subspecialties such as control wiring and fire-alarm may be performed by specialists trained in the devices being installed, or by inside wiremen. Wiremen are generally trained in one of five primary specialties: commercial, residential, light industrial, industrial, and low-voltage wiring, more commonly known as Voice-Data-Video, or VDV. In the United States, electricians are divided into two primary categories: linemen, who work on electric utility company distribution systems at higher voltages, and wiremen, who work with the lower voltages utilized inside buildings. Home Improvement do it yourself electrician general contractor handyman plumber renovation rooferĮlectricians were originally people who demonstrated or studied the principles of electricity, often electrostatic generators of one form or another.
