
1000 Amp Service Entrance Switchgear NEMA 1/3R
- 1000A capacity for high-demand systems
- NEMA 1 indoor & 3R outdoor enclosures
- UL Listed & seismic zone compliant
UL 891 Certified
Siemens Approved OEM
EUSERC Approved
DEI Power's Power Panelboards and High-Capacity Electrical Distribution lineup includes UL 891-certified panelboards, switchboards, switchgear, remote power panels, service entrance switchgear, and SES units. Ranging from 400A to 4000A, these assemblies serve commercial, industrial, utility, data center, and healthcare applications with genuine Siemens components and NEMA 1/3R enclosures.




















































































Talk to our product experts for custom solutions.
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A power panelboard is a high-capacity electrical distribution assembly that receives power from a utility or transformer and distributes it to multiple branch circuits or downstream loads. Unlike lighting and appliance panels, power panelboards are rated for larger amperage loads — typically 400A and above — and are used in commercial, industrial, data center, and utility applications requiring heavy-duty, code-compliant power distribution.
Talk to our experts for custom solutions and tailored guidance.

Remote power panels and switchgear designed for hyperscale, enterprise, and edge data center power distribution.

Power panelboards and switchboards delivering reliable, code-compliant electrical distribution for commercial facilities.

High-amperage switchgear and panelboards engineered for continuous operation in demanding industrial plant environments.

UL 891-certified distribution assemblies supporting imaging equipment, life-safety loads, and mission-critical healthcare power.
Talk to our experts for custom solutions and tailored guidance.
In-house manufacturing at our 50,000 sq. ft. Ontario, CA facility means most orders ship within 1 business day, with built-to-order units in 4–6 weeks.
Every panelboard and distribution assembly is built with genuine Siemens components and UL 891 certification, ensuring code compliance and long-term field reliability.
From initial quote to post-installation, our specialists provide engineering guidance, accurate submittals, and coordinated delivery to keep your project on schedule.
Submit your project specs and a DEI Power specialist will respond with pricing, submittals, and delivery details — typically same 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.