
Switchgear
- Siemens Approved OEM manufacturing
- In-house build for faster delivery times
- Seismic-rated: UBC, CBC & IBC compliant
UL 891 Certified
EUSERC Approved
Siemens Approved OEM
DEI Power's 600 Amp Metal Enclosed Switchgear operates at 480Y/277V 3-Phase and includes switchboards, service entrance switchgear, SES sections, and meter mains. UL 891 certified and built with genuine Siemens components, these assemblies deliver reliable power distribution for commercial, industrial, and utility applications across the USA.





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For a 600 amp breaker in a 480Y/277V 3-phase system, wire sizing must comply with NEC requirements and is typically handled using multiple parallel conductors — commonly 3/0 AWG to 350 kcmil copper or aluminum conductors run in parallel sets, depending on conductor material, insulation rating, conduit fill, and ambient temperature. Because wire sizing for 600A applications is highly application-specific, DEI Power recommends consulting your project's electrical engineer or contacting DEI Power's in-house engineering team for configuration guidance tailored to your installation.
Talk to our experts for custom solutions and tailored guidance.

Provides reliable 480Y/277V power distribution for lighting, HVAC, and large electrical loads across office buildings and campuses.

Controls and protects high-demand electrical loads including motors, process equipment, and production machinery in industrial plants.

Delivers precise, uninterrupted 480Y/277V 3-phase power distribution critical for server infrastructure and uptime in data centers.

EUSERC-approved switchgear built to utility specifications for safe service entrance power control in infrastructure projects.
Talk to our experts for custom solutions and tailored guidance.
Our 50,000 sq. ft. Ontario, CA facility enables in-house builds, reducing lead times and delivering free nationwide shipping in 3–5 business days.
Every unit is built with genuine Siemens components under approved OEM authorization, fully UL 891 certified and EUSERC approved for code compliance.
From custom specifications to post-installation guidance, our in-house electrical engineering team supports your project at every critical stage.
Submit your project details and a DEI Power specialist will respond with accurate configuration guidance, pricing, 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.