4000A Main Circuit Breaker — 480V 3-Phase

Standard switchboard and panelboard sizes vary by amperage and voltage configuration. DEI Power's switchboards are available from 400A to 4000A, with dimensions of 14" D × 30" W × 90" H and a weight of approximately 300 lbs. Custom configurations are available to meet specific jobsite layouts, voltage requirements, and utility specifications upon request.

The primary types include front-accessible and rear-accessible switchboards, as well as main breaker and main lug configurations. Enclosure types range from NEMA 1 (indoor) to NEMA 3R (outdoor weather-resistant). DEI Power offers switchboards in a main breaker configuration with amperage options from 400A to 4000A and multiple voltage options including 480V and 480Y/277V.

DEI Power switchboards and switchgear support a wide range of voltage configurations including 120/240V, 240V, 208Y/120V, 240/120V, 480V, 480Y/277V, and 415/240V. This flexibility allows the equipment to serve diverse commercial, industrial, and utility applications across different electrical system designs.

Yes. DEI Power offers switchboards in NEMA 3R enclosures, which are weather-resistant and designed for outdoor installations. NEMA 3R enclosures protect against rain, sleet, and external ice formation, making them suitable for utility, infrastructure, and industrial applications where the equipment is exposed to outdoor conditions.

DEI Power switchboards and switchgear are UL Listed, UL 891 Certified, EUSERC Approved, and manufactured under Siemens Approved OEM authorization. They also comply with UBC, CBC, and IBC seismic requirements for all seismic zones, making them suitable for projects across the continental United States, including high-seismic regions.

DEI Power offers free shipping on all switchboard and switchgear orders nationwide. Most orders ship within 1 business day, with delivery in 3–5 business days. In-house manufacturing at their 50,000 sq. ft. Ontario, California facility minimizes delays. Custom-specified units may require additional lead time depending on configuration complexity.