MD Power Group

Founded in 1985, Potomac Testing provides a variety of electrical testing and engineering services. It undertakes projects for government agencies, property management firms, health care facilities, computer centers and electrical contractors. The company serves clients throughout Maryland, Virginia and Pennsylvania, as well as provides maintenance, protection and control modification, and power system survey and analysis services. Potomac Testing is a member of the International Electrical Testing Association and the National Electrical Contractors Association. In addition, the company offers protection replay mapping, disturbance monitoring, power quality analysis and infrared thermography services. It also specializes in ultrasonic inspection, device calibration, bushing replacement, cable repair and termination and fabrication services. The company provides repair services for transformers, circuit breakers, motor controls and network protectors. It has worked on the Naval Surface Warfare Center and Natelco projects. Potomac Testing maintains one of its locations in Bowie, Md.

Central Armature Works is an electrical apparatus installation and construction company that serves industrial and commercial businesses. Its products include belts, pulleys, couplings, chain sprockets, bearings, pillow blocks, gear motors and adjustable-speed motors. Central Armature also provides troubleshooting on control and power circuits, preventative maintenance and 24-hour emergency service. The company was founded in 1915 and is located in Washington, D.C. Central is a member of the National Electrical Contractors Association and the Electrical Apparatus Service Association.