UL 891 Certified certified

UL 891 Certified

Siemens Approved OEM certified

Siemens Approved OEM

EUSERC Approved certified

EUSERC Approved

3 Phase 4 Wire Power Systems — 120/240V Configuration

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.

600 Amp Service Entrance Switchgear NEMA 1/3R
240/120V Switchboard NEMA 1/3R
600 Amp Switchboard NEMA 1/3R
4000 Amp SES NEMA 1/3R
240/120V Service Entrance Switchgear NEMA 1/3R
3000 Amp Panelboard NEMA 1/3R
2500 Amp SES NEMA 1/3R
Remote Power Panels
1000 Amp Switchboard NEMA 1/3R
Service Entrance Switchgear NEMA 1/3R
240/120V Switchgear NEMA 1/3R
400 Amp SES NEMA 1/3R
800 Amp Panelboard NEMA 1/3R
1000 Amp Panelboard NEMA 1/3R
1600 Amp Switchboard NEMA 1/3R
3000 Amp Switchboard NEMA 1/3R
1000 Amp SES NEMA 1/3R
120/240V Meter Main NEMA 1/3R
Remote Power Panels
240/120V SES NEMA 1/3R
Remote Power Panels - 1200A
400 Amp Panelboard NEMA 1/3R
800 Amp SES NEMA 1/3R
120/240V Panelboard NEMA 1/3R
2000 Amp Panelboard NEMA 1/3R
Remote Power Panels - 800A
4000 Amp Switchgear NEMA 1/3R
1600 Amp Panelboard NEMA 1/3R
120/240V SES NEMA 1/3R
Remote Power Panels - 600A
Remote Power Panels
400 Amp Switchboard NEMA 1/3R
Switchgear
Switchboard NEMA 1/3R
2000 Amp Switchboard NEMA 1/3R
1200 Amp SES NEMA 1/3R
1200 Amp Service Entrance Switchgear NEMA 1/3R
SES (Service Entrance Section)
600 Amp SES NEMA 1/3R
415/240V Switchgear NEMA 1/3R
Meter Main NEMA 1/3R
4000 Amp Switchboard NEMA 1/3R
1600 Amp Switchgear NEMA 1/3R
Panelboard NEMA 1/3R
2000 Amp Service Entrance Switchgear NEMA 1/3R
3000 Amp Service Entrance Switchgear NEMA 1/3R

Our Range of Products

600 Amp Service Entrance Switchgear NEMA 1/3R

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
240/120V Switchboard NEMA 1/3R

240/120V Switchboard NEMA 1/3R

  • 240/120V switchboard, indoor or outdoor rated
  • UL listed with genuine Siemens components
  • Seismic compliant: UBC, CBC, and IBC
600 Amp Switchboard NEMA 1/3R

600 Amp Switchboard NEMA 1/3R

  • 600A rating with multi-voltage options
  • UL 891 certified, EUSERC approved assembly
  • NEMA 1 or 3R, main breaker configuration
4000 Amp SES NEMA 1/3R

4000 Amp SES NEMA 1/3R

  • 4000A SES with multi-voltage configurations
  • UL 891 certified, EUSERC approved build
  • NEMA 1 or 3R, built to utility specifications
240/120V Service Entrance Switchgear NEMA 1/3R

240/120V Service Entrance Switchgear NEMA 1/3R

  • 240/120V config, NEMA 1 or 3R enclosures
  • UL listed, EUSERC approved for compliance
  • Seismic compliant: UBC, CBC, and IBC
3000 Amp Panelboard NEMA 1/3R

3000 Amp Panelboard NEMA 1/3R

  • 3000A panelboard, main breaker configuration
  • NEMA 1 indoor or NEMA 3R outdoor options
  • UL 891 certified, EUSERC approved build

Showing 1 to 6 of 46 results

Frequently Asked Questions

What does 3-phase 4 wire mean in electrical?

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.

What is a 3-phase 4 wire connection?

What voltage configurations are available in this product line?

What amperage ranges are available for 3-phase 4-wire 120/240V systems?

Are these products UL listed and code compliant?

What enclosure ratings are available for indoor and outdoor installations?

How quickly can 120/240V power distribution equipment ship?

Didn't find what you're looking for?

Talk to our experts for custom solutions and tailored guidance.

Industries We Serve

Data Centers & Colocation

Data Centers & Colocation

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

Commercial Buildings

Commercial Buildings

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

Industrial & Manufacturing

Industrial & Manufacturing

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

Utility & Infrastructure

Utility & Infrastructure

Service entrance switchgear and SES assemblies built to approved utility specifications protect and manage power entry points for utility infrastructure.

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

UL 891 Certified & Siemens OEM Built

Every 120/240V system ships with full UL 891 compliance and genuine Siemens components, ensuring code-compliant, field-ready performance on every project.

Industry-Leading Lead Times

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.

USA-Manufactured, BABA Compliant

All products are manufactured and assembled in the USA with Buy America Build America compliance, supporting domestic procurement requirements on public and federal projects.

Get a Fast Quote on 120/240V Power Systems

Submit your requirements and an DEI Power specialist will respond same business day with pricing, submittal documents, and delivery details.

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.