4000 Amp Circuit Breakers — 480V 3-Phase

Yes. All DEI Power 4000A 480V assemblies are UL Listed and UL 891 certified for low-voltage switchgear construction. They are also EUSERC Approved and meet UBC, CBC, and IBC requirements for all seismic zones, ensuring full code compliance for commercial, industrial, and utility installations.

All 4000A assemblies are available in NEMA 1 enclosures for indoor installations and NEMA 3R enclosures for outdoor or weather-exposed environments. This flexibility allows deployment across a wide range of jobsite conditions, including rooftop, pad-mounted, and interior electrical room settings.

DEI Power's 4000A products support multiple voltage configurations including 120/240V, 208Y/120V, 240V, 240/120V, 480V, 480Y/277V, and 415/240V. This range covers the majority of commercial and industrial service entrance requirements across the United States.

Yes. Service entrance switchgear, meter mains, and SES products must be built to approved utility specifications per applicable utility standards. DEI Power's specialist team works directly with customers to ensure each assembly is configured to meet the requirements of the serving utility before fabrication begins.

Most orders ship within 1 business day from DEI Power's 50,000 sq. ft. Ontario, California facility, with standard delivery in 3–5 business days. In rare cases, up to 5 business days may be required for shipping preparation. Free shipping is included on all orders, and each unit includes a 1-year warranty.

Yes. DEI Power offers custom switchgear built to your specifications, including layout, voltage, amperage, and jobsite requirements. Their in-house engineering support team provides configuration guidance, clear documentation, and project coordination to reduce change orders and field adjustments throughout the procurement process.