Duplex Electrical Supply was founded in 1990 on the North Shore of Long Island known as the Gold Coast. From the very first sale to the present-day Duplex’s #1 goal was to service the electrical contractors’ needs. We realize your time is valuable, so we get you in and out as quickly as possible. If you can’t make it to us, we offer same day deliveries, usually within a few hours. With our knowledgeable staff and breadth of inventory, Duplex is capable of serving the one-man shop or the large project with fair and competitive pricing. Give Duplex a call; we pride ourselves on the ability of our knowledgeable staff to quickly and professionally service all of your electrical needs.