Welcome to Tri-County Electrical Supply Inc.Founded in 1984 in a 2,400 square-foot building, Tri-County Electrical Supply Inc., on Jacksonville Road in Warminster, PA. originally focused only on industrial accounts. Over the years as our business has expanded into other areas of the electrical market, so too has our building expanded. The warehouse, office, and showroom currently encompass 25,000 square feet. We are able to handle any size order and we can ship orders to anywhere in the country. Give us a call today and let us show you the Tri-County Electrical difference.