400 Amp All in Ones in San Diego
ESU Sells New, Used & Recycled Transformers and Electrical Supplies including 400 amp all in ones for the San Diego, Orange County, Riverside and LA areas!
ESU has long been a go-to partner for San Diego electricians and homeowners who need reliable, professional support with electrical supplies. Over the years, we’ve helped countless local customers procure everything from 400 Amp All in ones and meter stacks to outdoor panelboards, breakers, fuses, and transformers. Whether a homeowner is upgrading their service or a contractor is installing a new system for a commercial project, we understand the challenges unique to San Diego’s codes and environment. Our team is familiar with local permitting requirements, utility interconnection rules, and the best practices for outdoor installations — all to make your job easier.
When it comes to 400 Amp All in one units, these are combined meter-main service devices that combine the meter socket and main breaker in a single enclosure. They are especially useful in situations where outdoor mounting is required or desired. For example, Leviton offers a 30-space outdoor all-in-one meter load center combo with a 200 A main breaker and a NEMA 3R enclosure, designed so the entire load center can be wired at rough-in before breakers are installed. ESU also helps customers choose the right panelboards based on application: whether it’s a main breaker panel, subpanel, or specialized distribution board. In brief, main breaker panelboards include a built-in main breaker to shut off the entire panel, while main lug (lug only) boards rely on an upstream disconnect. Our experience enables us to guide you in selecting the right style, rating, and configuration for your project — then deliver or install it on time.
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