UL 891 Certified certified

UL 891 Certified

EUSERC Approved certified

EUSERC Approved

Siemens Approved OEM certified

Siemens Approved OEM

800 Amp Service Entrance Disconnect Switches

DEI Power's 800 Amp Service Entrance Disconnect Switches include UL 891-certified switchgear, switchboards, meter mains, and service entrance sections. Built with genuine Siemens components, these heavy-duty units support commercial, industrial, and utility applications in NEMA 1 and NEMA 3R enclosures.

Service Entrance Switchgear NEMA 1/3R
SES (Service Entrance Section)
Meter Main NEMA 1/3R
Switchboard NEMA 1/3R

Our Range of Products

Service Entrance Switchgear NEMA 1/3R

Service Entrance Switchgear NEMA 1/3R

  • NEMA 1 & 3R indoor/outdoor enclosures
  • 400A–4000A amperage range available
  • UL 891 & EUSERC certified assembly
SES (Service Entrance Section)

SES (Service Entrance Section)

  • Meets all seismic zone UBC/CBC/IBC codes
  • 400A–4000A flexible amperage options
  • NEMA 1 & 3R enclosures for any install
Meter Main NEMA 1/3R

Meter Main NEMA 1/3R

  • UL Listed, EUSERC-approved construction
  • NEMA 1 & 3R for indoor/outdoor use
  • Genuine Siemens components throughout
Switchboard NEMA 1/3R

Switchboard NEMA 1/3R

  • Siemens Approved OEM switchboard build
  • 400A–4000A main breaker configuration
  • NEMA 1 & 3R heavy-duty enclosures

Frequently Asked Questions

What size ground wire is needed for an 800 amp service?

While DEI Power's 800A service entrance disconnect switches are built to meet UBC, CBC, and IBC requirements for all seismic zones and carry UL 891 certification, specific grounding conductor sizing for an 800A service is governed by NEC Table 250.66 and your local jurisdiction's adopted code. For project-specific grounding and conductor sizing guidance, consulting with a DEI Power specialist is recommended to confirm the correct configuration for your installation.

What are the NEC requirements for disconnect switches?

What certifications do DEI Power's 800A service entrance disconnect switches carry?

Are these disconnect switches suitable for outdoor installation?

What product types are available in DEI Power's 800A service entrance disconnect switch lineup?

What industries are DEI Power's 800A service entrance disconnect switches designed for?

How quickly can I receive a DEI Power 800A service entrance disconnect switch?

Where are DEI Power's 800A service entrance disconnect switches manufactured?

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

Provides reliable 800A service entrance power distribution for office complexes, retail centers, and mixed-use developments.

Industrial & Manufacturing

Industrial & Manufacturing

Delivers heavy-duty power control and protection for production facilities, processing plants, and manufacturing environments.

Utility & Infrastructure

Utility & Infrastructure

Supports utility substation interconnections and critical infrastructure power distribution with EUSERC-approved equipment.

Data Centers & Healthcare

Data Centers & Healthcare

Ensures uninterrupted power for mission-critical data center and healthcare facility electrical systems requiring continuous uptime.

Didn't find what you're looking for?

Talk to our experts for custom solutions and tailored guidance.

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Why Contractors & Engineers Choose DEI Power

In-House Manufacturing & Fast Lead Times

DEI Power manufactures switchgear in-house at a 50,000 sq. ft. California facility, enabling faster builds, fewer delays, and free shipping in 3-5 business days.

UL 891 Certified & Siemens OEM Quality

Every unit is UL 891 certified and built with genuine Siemens components as an approved OEM, ensuring code compliance, precision engineering, and long-term reliability.

Dedicated Technical & Project Support

Specialists provide configuration guidance, custom utility spec compliance, and project support to reduce change orders, field adjustments, and schedule risk.

Get a Quote for Your 800A Disconnect Switch

Submit your project details and a DEI Power specialist will respond with configuration options, pricing, and utility compliance guidance.

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.