UL 891 Certified certified

UL 891 Certified

EUSERC Approved certified

EUSERC Approved

Approved Siemens OEM certified

Approved Siemens OEM

400 Amp Meter Main Panel | 400A Combo Meter Solutions

DEI Power's 400 Amp Meter Main Panel category offers UL 891-certified, EUSERC-approved combo meter solutions built with genuine Siemens components. Available in NEMA 1 and NEMA 3R enclosures across multiple voltage configurations, these units serve commercial, industrial, and utility applications with heavy-duty construction and service-friendly layouts.

480V Meter Main NEMA 1/3R
240V Meter Main NEMA 1/3R
Meter Main NEMA 1/3R
480Y/277V Meter Main NEMA 1/3R
240/120V Meter Main NEMA 1/3R
400 Amp Meter Main NEMA 1/3R
415/240V Meter Main NEMA 1/3R
120/240V Meter Main NEMA 1/3R
208Y/120V Meter Main NEMA 1/3R

Our Range of Products

480V Meter Main NEMA 1/3R

480V Meter Main NEMA 1/3R

  • 480V rated for large industrial applications
  • UL 891 Certified & EUSERC Approved build
  • NEMA 1 indoor & NEMA 3R outdoor options
240V Meter Main NEMA 1/3R

240V Meter Main NEMA 1/3R

  • 240V heavy-duty for long-service environments
  • NEMA 1 & NEMA 3R enclosure flexibility
  • UL 891 Certified & EUSERC Approved unit
Meter Main NEMA 1/3R

Meter Main NEMA 1/3R

  • 400A to 4000A scalable amperage options
  • 7 voltage configs from 120/240V to 480V
  • UL Listed, UL 891 & EUSERC Approved
480Y/277V Meter Main NEMA 1/3R

480Y/277V Meter Main NEMA 1/3R

  • 480Y/277V for heavy industrial power needs
  • NEMA 1 indoor & NEMA 3R outdoor enclosures
  • UL Listed with all seismic zone compliance
240/120V Meter Main NEMA 1/3R

240/120V Meter Main NEMA 1/3R

  • 240/120V rated for commercial & industrial use
  • NEMA 1 indoor & NEMA 3R outdoor enclosures
  • UL Listed & seismic zone compliant build
400 Amp Meter Main NEMA 1/3R

400 Amp Meter Main NEMA 1/3R

  • 400A rating across multiple voltage configs
  • EUSERC Approved for utility-grade installs
  • NEMA 1 indoor & NEMA 3R outdoor enclosures

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Frequently Asked Questions

What is a 400 Amp meter main panel?

A 400 Amp meter main panel, also called a combo meter main, is a single enclosure that integrates the utility meter socket and the main circuit breaker disconnect. It simplifies service entrance installations by combining two functions into one UL-listed assembly, reducing installation time and ensuring code compliance for commercial and industrial projects.

What voltage configurations are available for 400A meter main panels?

What is the difference between NEMA 1 and NEMA 3R enclosures?

Are these meter main panels EUSERC approved?

What certifications do DEI Power's meter main panels carry?

What are the standard dimensions and weight of a 400A meter main unit?

How quickly can a 400A meter main panel be shipped?

Didn't find what you're looking for?

Talk to our experts for custom solutions and tailored guidance.

Industries We Serve

Commercial Buildings

Commercial Buildings

Meter main panels provide reliable service entrance solutions for office buildings, retail centers, and mixed-use developments.

Industrial & Manufacturing

Industrial & Manufacturing

Heavy-duty meter mains support high-demand power distribution in factories, processing plants, and production facilities.

Utility & Infrastructure

Utility & Infrastructure

EUSERC-approved meter mains meet utility specifications for substations, grid infrastructure, and multi-tenant service points.

Data Centers & Critical Facilities

Data Centers & Critical Facilities

UL 891-certified meter mains deliver safe, code-compliant power control for data centers and mission-critical environments.

Didn't find what you're looking for?

Talk to our experts for custom solutions and tailored guidance.

You might also like

Why Contractors & Engineers Choose DEI Power

Approved Siemens OEM Manufacturer

Every meter main is built with genuine Siemens components as an approved OEM, ensuring precision-engineered performance and full code compliance on every project.

Fastest Lead Times in the Industry

In-house manufacturing at our 50,000 sq. ft. Ontario, CA facility means faster builds, fewer delays, and free shipping delivered in 3–5 business days nationwide.

UL 891 Certified & Seismic Compliant

All units carry UL 891 certification, EUSERC approval, and meet UBC, CBC, and IBC seismic zone requirements, reducing risk and eliminating costly field adjustments.

Get a Quote for Your 400A Meter Main Project

Submit your project details and a DEI Power specialist will respond with pricing, configuration guidance, and lead time within one business day.

Contact Us Today

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.