400 Amp 3 Phase Main Distribution Panels

DEI Power's 400A 3-phase panels are available in NEMA 1 enclosures for indoor installations and NEMA 3R enclosures for outdoor or weather-exposed environments. This flexibility allows proper specification for both interior electrical rooms and exterior pad-mount or rooftop installations across a wide range of commercial and industrial settings.

The panels support a broad range of voltage configurations including 120/240V, 240V, 208Y/120V, 240/120V, 480V, 480Y/277V, and 415/240V. This versatility makes them suitable for diverse electrical systems in commercial buildings, industrial facilities, data centers, and utility infrastructure projects requiring 3-phase power distribution.

Yes. While this category features 400A configurations, DEI Power's panelboards, switchboards, switchgear, meter mains, and service entrance equipment are available from 400A up to 4000A. If your load requirements grow or project specs change, a DEI Power specialist can assist in selecting the appropriate higher-amperage configuration.

Yes. DEI Power offers Service Entrance Switchgear, SES (Service Entrance Section), and Meter Main products that are EUSERC Approved and built to approved utility specifications. Because utility standards require custom configurations, these products require a specialist consultation before ordering — contact DEI Power directly to initiate the specification and quoting process.

Most orders ship within 1 business day from DEI Power's 50,000 sq. ft. facility in Ontario, California. In rare cases, up to 5 business days may be required. Standard delivery is 3–5 business days with free shipping on all orders. All products include a 1-year warranty for reliable performance from day one.

Yes. All DEI Power 400A 3-phase distribution panels meet UBC, CBC, and IBC requirements for all seismic zones. This makes them suitable for projects in California and other seismically active regions where code compliance for structural and electrical equipment is mandatory. EUSERC approval further confirms suitability for utility-grade installations.