480V Panelboards in San Diego
ESU Sells New, Used & Recycled Transformers and Electrical Supplies including 480v Panelboards for the San Diego, Orange County, Riverside and LA areas!
ESU has a long and proven track record of serving San Diego electricians and homeowners with a comprehensive range of electrical supplies—whether you're working on a commercial job, a residential upgrade, or a specialty retrofit. Over the years, we’ve helped clients with 480v panelboards, breakers, fuses, and transformers—supplying both stock items and hard-to-find parts. We understand how critical reliable 480 V systems are in light industrial and large residential settings, so we make it a point to stock the brands, styles, and configurations local contractors and homeowners need most.
When it comes to 480v panelboards, we carry several basic types to fit different use cases: Main-lug only (MLO) panels, which provide the incoming feed without a built-in main breaker; main breaker panelboards, which include a factory-installed switch to disconnect all circuits; and meter-main or combination panelboards that integrate metering plus distribution. These panelboards are designed to distribute three-phase 480 V power safely, protecting branch circuits through molded-case or bolt-on breakers compatible with industrial systems. ESU can help you choose the right style of 480v panelboards, match the correct breaker or fuse types, and ensure your transformers and other downstream gear are sized properly—making your job simpler, safer, and more efficient.
For Circuit Breakers, our San Diego location stocks most major brands such as Square D, Siemens, ITE, Cutler Hammer, General Electric, and more. Along with Circuit Breakers, our inventory includes panelboards up to 600V, disconnects, fuses up to 3000 amps, meter sockets, lighting ballasts, and specialty bulbs. With a reputation built on reliability and expertise, ESU, Inc. continues to be San Diego’s go-to electrical distributor and wholesaler for both standard and hard-to-find electrical supplies.
In addition to our extensive inventory, we also buy new and used electrical equipment. Whether you're upgrading, downsizing, or clearing out surplus stock, we’re interested in purchasing equipment from major brands such as SquareD, Siemens, ITE, Cutler Hammer, General Electric, Federal Pacific, Pushmatic, Zinsco, Crouse Hinds, Challenger, Westinghouse, Sylvania, and Bryant. We're especially looking for items like Circuit Breakers, Transformers, Disconnects, Panelboards up to 600V, Fuses up to 3000 Amps, Bolt Switch Pullouts, Meter Sockets, Lighting Ballasts, and specialty bulbs including Metal Halide and Sox. Reach out today to turn your unused inventory into cash.
ESU Inc also rents electrical equipment. Greenlee Wire Pullers, Conduit benders as well as many other electrician tools.
Talk directly to one of our specialists, Ed, Scott, Kevin or Chris at 858.558.2850 for assistance. Have an emergency? Call our emergency hotline 619-540-2952