
600 Amp Service Entrance Switchgear NEMA 1/3R
- 600A service entrance, multi-voltage ready
- UL listed, EUSERC approved for compliance
- NEMA 1 or 3R enclosure, seismic compliant
UL 891 Certified
Siemens Approved OEM
EUSERC Approved
DEI Power's 3 Phase 4 Wire Power Systems in 120/240V configuration include panelboards, switchboards, switchgear, remote power panels, service entrance sections, and meter mains. Built with genuine Siemens components and UL 891 certified, these systems deliver reliable branch circuit distribution for commercial, industrial, data center, and utility applications.














































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A 3-phase 4-wire system uses three hot conductors carrying alternating current at 120° phase offsets and one neutral conductor. The neutral enables both line-to-neutral voltages (e.g., 120V) and line-to-line voltages (e.g., 240V) to coexist in the same distribution system, making it highly versatile for mixed residential, commercial, and industrial loads.
Talk to our experts for custom solutions and tailored guidance.

120/240V RPPs and panelboards distribute structured branch circuit power across server rows, colocation cabinets, and AI compute clusters.

Panelboards, switchboards, and meter mains in 120/240V configurations manage power distribution in offices, campuses, and retail facilities.

High-amperage switchgear and switchboards handle large electrical loads and protect critical systems in demanding manufacturing environments.

Service entrance switchgear and SES assemblies built to approved utility specifications protect and manage power entry points for utility infrastructure.
Talk to our experts for custom solutions and tailored guidance.
Every 120/240V system ships with full UL 891 compliance and genuine Siemens components, ensuring code-compliant, field-ready performance on every project.
In-stock units ship within 1 business day from our 50,000 sq. ft. Ontario, CA facility, keeping your project on schedule even under emergency timelines.
All products are manufactured and assembled in the USA with Buy America Build America compliance, supporting domestic procurement requirements on public and federal projects.
Submit your requirements and an DEI Power specialist will respond same business day with pricing, submittal documents, and delivery details.
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.