3 Phase Electrical Distribution Panels

A 3-phase electrical panel is typically a metal enclosure — NEMA 1 for indoor or NEMA 3R for outdoor use — containing a main breaker, a three-phase busbar assembly, and rows of branch circuit breakers. DEI Power's panels are wall-mounted with a service-friendly layout, offering a clean, organized appearance suited for data center halls, electrical rooms, and commercial facilities.

A 3-pole (3P) breaker controls all three phase conductors in a 3-phase system, suitable for 480V or 208V delta configurations. A 4-pole (4P) breaker adds a fourth pole for the neutral conductor, used in 4-wire wye systems like 480Y/277V or 208Y/120V. DEI Power's panels support both configurations across their full amperage range from 225A to 4000A.

DEI Power offers 3-phase electrical distribution panels in amperage ratings of 225A, 400A, 600A, 800A, 1000A, 1200A, 1600A, 2000A, 2500A, 3000A, and 4000A. Remote Power Panels are available from 225A to 1600A, while switchboards, switchgear, and panelboards extend up to 4000A to cover the full spectrum of commercial and industrial project requirements.

DEI Power's 3-phase distribution panels support multiple voltage configurations including 480Y/277V, 208Y/120V, 120/240V, 240V, 415/240V, and 480V. This makes them suitable for data center server loads, commercial lighting and HVAC circuits, industrial machinery, and utility infrastructure across a wide range of application requirements.

Yes. Many configurations are stocked at DEI Power's 50,000 sq. ft. facility in Ontario, California and ship within 1 business day with free delivery in 3–5 business days. Built-to-order configurations have typical lead times of 4–6 weeks, significantly faster than the industry-standard lead times that can exceed 16 weeks. Emergency and rush orders are supported.

DEI Power's panels are UL 891 certified for low-voltage switchgear and switchboard construction, EUSERC approved for utility service entrance applications, and manufactured as an approved Siemens OEM. Products also comply with UBC, CBC, and IBC seismic requirements and meet Build America Buy America (BABA) standards for federally funded projects.