Switchgear
- Siemens Approved OEM manufacturing
- In-house builds ensure faster delivery
- 400A–4000A, 7 voltage configurations
UL 891 Certified
EUSERC Approved
Siemens Approved OEM
DEI Power's 400 Amp 1 Phase Switchboards include UL 891-certified switchboards, service entrance switchgear, switchgear, and meter mains built with genuine Siemens components. Available in NEMA 1 and NEMA 3R enclosures, these units support commercial, industrial, and utility power distribution applications across multiple voltage configurations.
Talk to our product experts for custom solutions.
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For a 400 amp single-phase service, wire sizing must comply with the National Electrical Code (NEC) and local utility requirements. DEI Power's 400A single-phase switchboards support multiple voltage configurations including 120/240V and 240/120V. Because wire sizing depends on factors such as conductor material, conduit fill, and installation conditions, it is recommended to consult with a licensed electrician or contact a DEI Power specialist for project-specific guidance.
Talk to our experts for custom solutions and tailored guidance.
400A switchboards deliver reliable power distribution and protection for large commercial facilities and campuses.
Heavy-duty switchgear supporting high-demand industrial electrical loads and manufacturing operations requiring uptime.
EUSERC-approved switchgear built to utility specifications for substations and critical infrastructure power systems.
UL 891-certified switchgear supporting mission-critical uptime for hyperscale and enterprise data center facilities.
Talk to our experts for custom solutions and tailored guidance.
As an approved Siemens OEM, every switchboard is built with genuine Siemens components, ensuring code-compliant, precision-engineered performance you can trust.
Our 50,000 sq. ft. Ontario, CA facility enables in-house manufacturing with industry-leading lead times — most orders ship within 1 business day.
Over a decade supporting commercial, industrial, and utility power projects with UL 891-certified switchgear, expert project support, and zero-compromise quality.
Submit your project details and a DEI Power specialist will respond with pricing, configuration guidance, and lead time confirmation.
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.
