Products
Custom UL 891 switchgear manufacturing — 800A to 4000A
We specialize in the design and manufacturing of UL 891-certified switchgear ranging from 800 amps to 4000 amps, tailored to the most demanding power distribution requirements.
UL 891 Certified
Precision-built UL 891 switchgear you can count on
We specialize in the design and manufacturing of UL 891-certified switchgear ranging from 800 amps to 4000 amps, tailored to the most demanding power distribution requirements.
Our switchgear is engineered to meet exact specifications, built to last, and compliant with the highest U.S. standards—including UL 891.
Specifications
Voltage & System Compatibility
We build UL 891 switchgear for a wide range of voltage systems and wiring configurations, each carefully designed to meet your project’s specific load, layout, and environmental requirements.
All assemblies are UL 891 tested, fabricated with certified materials, and undergo rigorous factory inspections—backed by decades of proven engineering expertise.
Reliable power solutions for data centers & crypto mining
- 415/240 V 3-Phase, 4-Wire
- High amperages up to 4000A
- Fast availability — no long wait times
Voltages (1 Phase & 3 Phase)
- 480Y/277 V
- 120/208Y V
- 120/240 V
- 600 V
- 800 V
- 1000 V
-
415/240 V
3-Phase, 4-Wire
Amperages
- 600A
- 800A
- 1200A
- 1600A
- 2000A
- 2500A
- 3000A
- 4000A
Built to Precision
Engineered for your projects needs
Every switchboard we build is fully custom, built to match footprint limitations, integration needs, and service conditions. We offer:
Front and rear access designs
Flexible access options simplify installation, wiring, and maintenance in any switchgear configuration.
Top or bottom cable entry/exit
Adaptable entry and exit designs fit site constraints and streamline cable routing.
Draw-out or fixed breakers
Choose draw-out or fixed breakers for safe operation and simplified maintenance.
Main-Tie-Main, Main-Tie, and Split Bus configurations
Custom configurations enhance system redundancy, load management, and operational flexibility.
Interior or exterior-rated enclosures (NEMA 1, 3R, 12, etc.)
Durable NEMA-rated enclosures ensure protection in both indoor and outdoor environments.
Full coordination with gen-sets, ATS, and load banks
Integrated coordination delivers power control with generators, transfer switches, and load banks.
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Manufactured in the United States & powered by years of experience
Our products are proudly designed and engineered in the United States. Because we don’t rely on overseas manufacturing, international tariffs don’t affect our pricing. This allows us to offer consistent, competitive prices while delivering top-quality, American-made solutions.
Industries We Serve
Reliable UL 891 switchgear solutions for California industries
Our engineering team brings over 30 years of real-world experience into every project, ensuring that every piece of UL 891 switchgear we produce is both technically sound and field-ready.
Data Centers
High-performance electrical panels built for uptime & scalability
Manufacturing Plants
Efficient systems keeping production lines powered without downtime
Retail & Distribution
Scalable power systems driving logistics, operations, and customer service
Commercial Buildings
Custom electrical panels enhancing safety & efficiency
Industries We Serve
Reliable UL 891 switchgear solutions for California industries
Our engineering team brings over 30 years of real-world experience into every project, ensuring that every piece of UL 891 switchgear we produce is both technically sound and field-ready.
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Let’s build your UL 891 certified switchgear
If your project demands custom-built switchgear from 800A to 4000A, with compliance, reliability, and seamless integration—you’re in the right place. Contact DEI Power today to request a quote or start a technical consultation.
Fastest lead times
Fastest lead times guaranteed with local manufacturing
Emergency and overnight shipping
We deliver California-manufactured switchgear with the quickest turnaround times in the industry. By keeping production local, we eliminate delays and ensure faster delivery statewide. Our streamlined process guarantees UL 891 certified low voltage switchgear arrives on schedule, ready for installation.
