Source UL 891 480Y/277V switchboards configured around your project requirements. DEI supports commercial and industrial power distribution with U.S.-manufactured assemblies, Siemens components, project-specific review, and coordinated submittals for service upgrades, equipment replacement, new construction, and facility expansions.
Looking for switchgear manufacturers that can meet demanding specifications without extended lead times? Our U.S.-based team builds UL 891 low-voltage switchgear from 400A–4000A with in-house engineering, copper busbar fabrication, and project support
Our team of experienced engineers supplies 480Y/277V switchboards for commercial, industrial, and infrastructure power distribution. Assemblies are manufactured in the U.S. using Siemens components, with amperage configurations from 400A to 4000A and project requirements reviewed before equipment enters production.
Switchboards must meet electrical code requirements, project specifications, and operational demands across commercial and industrial facilities. Before quoting, we review voltage, ampacity, fault rating, main device selection, metering requirements (when applicable), and lineup configuration so your submittal aligns with the project scope. Our assemblies use Siemens components and include a one-year warranty for added confidence.
Standard switchboard configurations can typically ship in 4–6 weeks. Early review of voltage, ampacity, available fault current, breaker requirements, metering, and lineup configuration helps reduce revisions and keeps the project moving from approved drawings through production and shipment.
Commercial buildings, manufacturing plants, distribution facilities, industrial sites, infrastructure projects, large mechanical loads, facility expansions, and other applications requiring 480Y/277V power distribution.
A 50,000 sq. ft. U.S. manufacturing and warehouse operation supports faster coordination between engineering, fabrication, assembly, testing, and shipment. In-house copper bus fabrication, CNC machining, UL 891 capabilities, and Siemens components help keep switchgear builds aligned with project specifications and production schedules.
Standard configurations typically ship in 4–6 weeks.
Keep procurement and installation schedules moving with shorter production timelines for standard builds.
A 480Y/277V system provides three-phase power for demanding facility loads while supporting 277V line-to-neutral circuits from the same distribution system. Our experts help configure switchboards around the conditions specified for the project.
High-performance electrical switchboards built for uptime & scalability
Efficient systems keeping production lines powered without downtime
Scalable power systems driving logistics, operations, and customer service
Custom switchtboards enhancing safety, efficiency, and tenant comfort
A 480Y/277V system provides three-phase power for demanding facility loads while supporting 277V line-to-neutral circuits from the same distribution system. Our experts help configure switchboards around the conditions specified for the project.
Send your one-line, specifications, or equipment requirements for review. Our team can help confirm ampacity, available fault current, breaker configuration, metering, enclosure requirements, and project schedule before preparing your quote and coordinating the next steps for drawings, submittals, and production.
Standard lead times on switchgear configurations are typically 4–6 weeks, while custom builds may require additional time depending on complexity, components, and project requirements.
Yes. DEI Power manufactures low-voltage switchgear in the United States, with engineering, fabrication, assembly, and testing coordinated through its U.S. operation.
Shipping is coordinated around the equipment dimensions, destination, site requirements, and project schedule. Delivery details are reviewed as part of the order process.
Returns and exchanges depend on the equipment configuration, production status, and order terms. Contact DEI to review the specific requirements for your project.
DEI Power manufactures both indoor and NEMA 3R outdoor switchgear for applications requiring weather-resistant enclosures.
Equipment can be configured around breaker arrangements, metering, cable entry, bus requirements, enclosure type, footprint, and other project specifications.
Contact us to send available drawings, one-lines, amperage, voltage, breaker requirements, enclosure type, metering needs, and project schedule. Our team will review the information and help determine the appropriate configuration.
Office Location
4725 Troy Ct.
Jurupa Valley CA 92509
Contact Info
Phone: +1 (866) 773-8050
Email: sales@deipower.com
