
1000 Amp Service Entrance Switchgear NEMA 1/3R
- 1000A switchgear for industrial systems
- UL 891 Certified & EUSERC Approved
- Seismic compliant: UBC, CBC, and IBC
UL 891 Certified
EUSERC Approved
Siemens Approved OEM
3 Phase NEMA 3R Electrical Panels from DEI Power include switchgear, switchboards, panelboards, meter mains, and service entrance sections built with genuine Siemens components. Available in amperage ratings from 400A to 4000A and multiple voltage configurations, all assemblies are UL 891 certified, EUSERC approved, and rated for outdoor weather-resistant installation.




































































































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NEMA 3R is an enclosure rating designating protection against rain, sleet, and external ice formation, making it suitable for outdoor and weather-exposed installations. Unlike NEMA 1 indoor enclosures, NEMA 3R panels are built to withstand direct exposure to the elements while protecting internal electrical components from corrosion and moisture ingress.
Talk to our experts for custom solutions and tailored guidance.

NEMA 3R panels provide reliable outdoor-rated power distribution for office buildings, retail centers, and campuses.

Heavy-duty NEMA 3R switchgear and panelboards support large electrical load control in manufacturing plants and processing facilities.

EUSERC-approved service entrance switchgear and SES panels meet utility specifications for substations and infrastructure projects.

High-amperage switchgear and panelboards deliver dependable power distribution for hyperscale and enterprise data center facilities.
Talk to our experts for custom solutions and tailored guidance.
As a Siemens Approved OEM operating from a 50,000 sq. ft. facility in Ontario, CA, DEI Power builds every panel with genuine Siemens components for verifiable quality and code compliance.
In-house switchgear manufacturing and a large stocked warehouse enable most orders to ship within 1 business day, delivered in 3–5 business days with free shipping nationwide.
Every panel is UL 891 certified, EUSERC approved, and engineered to meet UBC, CBC, and IBC seismic zone requirements, simplifying specification and reducing field change orders.
Submit your project specs and a DEI Power specialist will respond with pricing, configuration guidance, and lead time within one business day.
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.