4000 Amp Switchboard NEMA 1/3R
- 4000A capacity for heavy industrial loads
- NEMA 1 & 3R enclosures, indoor/outdoor
- UL 891 & EUSERC approved assembly
UL 891 Certified
Siemens Approved OEM
EUSERC Approved
NEMA PB1.1 Standards & Specifications covers a comprehensive range of UL 891-certified switchboards, switchgear, panelboards, meter mains, service entrance sections, and remote power panels. Designed for commercial, industrial, and utility applications, these products meet seismic, EUSERC, and code compliance requirements with NEMA 1 and NEMA 3R enclosure options.
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NEMA 1 is an enclosure rating that designates indoor-use electrical equipment protected against contact with enclosed components. It provides basic protection against dust and personnel contact but is not designed for outdoor or wet environments. NEMA 1 enclosures are commonly used for switchboards, panelboards, switchgear, and meter mains installed inside commercial and industrial buildings.
Talk to our experts for custom solutions and tailored guidance.
Heavy-duty power distribution for office complexes, retail, and high-demand commercial facilities.
Reliable switchgear and service entrance equipment for industrial plants and large electrical load control.
EUSERC-approved meter mains and SES units for utility substations and critical infrastructure projects.
Remote power panels and switchgear for hyperscale data centers, colocation facilities, and AI compute halls.
Talk to our experts for custom solutions and tailored guidance.
As an approved Siemens OEM, DEI Power delivers precision-engineered, UL 891-certified switchgear built with genuine Siemens components for trusted code compliance.
With in-house manufacturing and a 50,000 sq. ft. facility in Ontario, CA, DEI Power ships most orders within 1 business day to keep your project on schedule.
All products are manufactured and assembled in the USA, meeting Build America Buy America requirements with strict quality control and seismic zone compliance.
Submit your project details and a DEI Power specialist will respond with a custom quote and configuration guidance 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.