Main Power Distribution Panels | Facility-Wide Power Control

Switchboards are typically floor-standing assemblies used for power distribution in commercial and industrial buildings, while switchgear refers to higher-rated assemblies designed for more demanding or utility-grade applications. Switchgear generally offers greater fault current interrupting capacity and is built to more rigorous standards such as UL 891 for low-voltage applications. DEI Power offers both types from 400A to 4000A in NEMA 1 and NEMA 3R enclosures.

DEI Power's power distribution panels are available in a wide range of amperage ratings including 400A, 600A, 800A, 1000A, 1200A, 1600A, 2000A, 2500A, 3000A, and 4000A. This broad selection covers light commercial installations through large-scale utility and industrial applications, allowing engineers and contractors to specify the exact capacity required for their project.

DEI Power's panels support multiple voltage configurations including 120/240V, 208Y/120V, 240V, 240/120V, 480V, 480Y/277V, and 415/240V. This multi-voltage availability ensures compatibility with diverse commercial, industrial, and utility electrical systems across the United States and internationally compliant installations.

All DEI Power distribution panels are UL Listed, with the majority UL 891 certified for low-voltage switchgear assemblies. Products are also EUSERC Approved, ensuring compliance with electric utility service entrance requirements. Additionally, panels meet UBC, CBC, and IBC seismic zone requirements, and DEI Power holds Siemens Approved OEM status, guaranteeing the use of genuine Siemens components throughout.

Yes. All main power distribution panels from DEI Power are available in NEMA 1 (indoor) or NEMA 3R (outdoor weather-resistant) enclosures. The NEMA 3R rating protects against rain, sleet, and external ice formation, making these units suitable for pad-mounted outdoor installations at commercial facilities, utility substations, and industrial job sites.

Most DEI Power orders ship within 1 business day from their 50,000 sq. ft. facility in Ontario, California, with standard delivery in 3–5 business days. Free shipping is included on all orders. In rare cases, up to 5 business days for shipment preparation may be required. All units include a 1-year warranty covering manufacturing defects and workmanship.