Commercial construction involves a lot of people, regulations, and time. You need a distributor who will make it as easy as possible to keep your projects on track, on schedule, and on time.
With our knowledge of codes, products, and applications, you can be assured you’ll get the right product the first time.
And when you have a big job where every minute and every dollar counts, ask about our job site cart and floor-to-floor delivery programs, designed to save you time and labor, while making your work a little (or a lot) easier.
With an inventory of more than $26 million, 250 brands, and 1,000 vendors, we'll get you the products you need, when and where you need them, at the right price.
Our fleet of 34 vans, trucks and flatbed delivery vehicles leave every weekday morning between 4 and 6 a.m. to deliver product throughout the D.C.–Maryland-Virginia area. Or you can stop by one of our 11 counters or three lighting showrooms on your way to the office or the jobsite. Click here for a list of locations.
Helps determine the proper wire size for an electrical circuit based on the voltage drop and current carrying capacity of an electrical circuit.
Save by switching to LED. This tool uses the bulb you have now to calculate potential savings and offers an energy-efficient LED alternative.
Conduit Fill is the percentage of area inside the conduit taken up by the cable(s). Get quick and easy results per NEC® guidelines.
Helps to estimate and manage cable installation projects. Provides the ability to alter data that indicates tension or sidewall pressure.
Quickly and easily illustrates the potential labor cost savings when using MCAP® cable in place of traditional MC cable.
Quickly identify and choose a specific Twist-Lock device and view related products. Detailed product information is available.
Browse or search for products to add, create a list, and use it to create a submittal. Share your list by email, or add it to your shopping cart.
Identify and choose a specific Kellems Mesh Grip, Cord Connector or liquidtight product. Detailed product information is available.
Determines the wire bundle outside diameter when using wires of different sizes. Provided by MB Cable Company of New Jersey.
Dominion Electric Supply Company, Inc. serves a number of markets. Click a photo for more information plus links to product groups, calculators and tools (apps), manufacturers, and projects.