400A 480V Panelboards

Yes. All DEI Power 400A 480V panelboards are UL 891 certified and built as a Siemens-approved OEM solution. The UL listing confirms the assembly meets established safety and performance standards for low-voltage switchgear, supporting code compliance on commercial, industrial, and utility projects.

DEI Power 400A panelboards are available in NEMA 1 (indoor) and NEMA 3R (outdoor, weather-resistant) enclosures. The NEMA 3R option protects against rain, sleet, and external ice formation, making it suitable for installations in covered outdoor or semi-outdoor environments such as utility yards and rooftop equipment rooms.

Yes. All 400A 480V panelboards from DEI Power are engineered to meet UBC, CBC, and IBC requirements for all seismic zones. This compliance is critical for projects in California and other seismically active regions where code enforcement requires verified structural performance of electrical enclosures.

In-stock units typically ship within 1 business day from DEI Power's 50,000 sq. ft. facility in Ontario, California, with delivery to the job site in 3-5 business days. Built-to-order configurations have typical lead times of 4-6 weeks. Free shipping is included on all orders nationwide.

400A 480V panelboards are widely used in commercial buildings, industrial facilities, utility infrastructure, healthcare facilities, and data centers. They provide branch circuit protection and structured power distribution for high-demand electrical loads including HVAC systems, industrial machinery, lighting, and critical facility equipment.

Yes. DEI Power offers built-to-order configurations tailored to specific project voltage, amperage, layout, and utility requirements. Due to utility standards, panelboards must be built to approved utility specifications. Contact an expert at (866) 773-8050 to discuss configuration options and receive a same-day quote.