400 Amp Switchboard NEMA 1/3R
- 400A rated, UL 891 & EUSERC Approved build
- Multi-voltage: 120/240V through 415/240V
- NEMA 1 & 3R enclosures, seismic compliant
UL 891 Certified
EUSERC Approved
Siemens Approved OEM
DEI Power's 400A 240V Disconnect Switches category features UL-listed, EUSERC-approved service entrance switchgear, panelboards, switchboards, SES units, and meter mains built with genuine Siemens components. Designed for commercial, industrial, and utility applications, these heavy-duty assemblies are available in NEMA 1 and NEMA 3R enclosures for reliable indoor and outdoor power distribution.
Talk to our product experts for custom solutions.
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Our 400A 240V disconnect switches and associated switchgear are UL Listed, UL 891 certified for low-voltage switchgear, and EUSERC approved. They also comply with UBC, CBC, and IBC seismic zone requirements. These certifications ensure code compliance and dependable performance across commercial, industrial, and utility applications.
Talk to our experts for custom solutions and tailored guidance.
Provides main service entrance protection and power distribution for office buildings, retail centers, and campuses.
Controls and protects large electrical loads in factories, processing plants, and manufacturing environments requiring continuous uptime.
Supports utility-grade service entrance and power distribution for substations, grid infrastructure, and public utility systems.
Ensures reliable, code-compliant power control for mission-critical facilities requiring zero-downtime electrical distribution.
Talk to our experts for custom solutions and tailored guidance.
As an approved Siemens OEM, every assembly uses genuine Siemens components, ensuring precision engineering and long-term reliability you can depend on.
In-house manufacturing at our 50,000 sq. ft. Ontario, CA facility means faster builds, free shipping, and delivery in 3–5 business days to keep your project on schedule.
All switchgear is UL 891 certified and EUSERC approved, meeting UBC, CBC, and IBC seismic requirements so you can purchase with confidence and avoid costly field adjustments.
Submit your project details and a DEI Power specialist will respond promptly with pricing, configuration guidance, and lead time information.
For immediate assistance, feel free to give us a direct call at (866) 773-8050. You can also send us a quick email at sales@deipower.com.
For immediate assistance, feel free to give us a direct call at (866) 773-8050. You can also send us a quick email at sales@deipower.com.
