Case Study · Data Centers

A 2500A generator board for Boyd CAT and 40 panels for C Square

Built for Boyd CAT and C Square

Aug 2026 – Nov 2026

Key facts

The build at a glance

One switchboard, 12 panelboards and 28 RPPs

Units

Generator switchboard; panelboards and RPPs

Product

2500A switchboard; 250A panelboards; 225A RPPs

Amperage

480Y/277V switchboard; 415V panelboards; 208Y/120V RPPs

Voltage

Tin-plated aluminum (switchboard)

Bus

NEMA 1 (indoor), all equipment

Enclosure

65 kAIC switchboard, with generator breakers specified at 100 kAIC; 65 kAIC mains on the 24 RPPs

Interrupting rating

UL 891 low-voltage (switchboard)

Listing

Siemens WL generator breakers and Siemens 3VA distribution breakers, LSIG, 100% rated; 60A 3-pole branches in the panelboards and RPPs

Breakers

10 weeks from the signed submittal (generator switchboard)

Quoted lead time

Jurupa Valley, California

Built in

01 · Brief

The brief

Two customers ordered directly from DEI. One order, from Boyd CAT, is a 2500A generator switchboard, with start-up services, for a generator and site package. The other, from C Square, is 12 panelboards and 28 remote power panels for a data center.

02 · Build

What DEI built

The generator board is specified as a UL 891 low-voltage switchboard: 2500A at 480Y/277V, three-phase four-wire, 65 kAIC, with tin-plated aluminum bus in a NEMA 1 indoor enclosure. It takes 3 Siemens WL 1200A breakers, for two generators and a temporary generator, each LSIG with Dynamic Arc Flash Sentry and 100% rated, and distributes through 5 Siemens 3VA breakers from 200A to 800A; a motor operator and Kirk-key interlocks are specified. The panel package is 12 panelboards with 250A main breakers at 415V and branch-circuit monitoring, 24 RPPs with 225A, 65 kAIC main breakers at 208Y/120V, and 4 monitored 225A RPPs with 42 circuits each, all NEMA 1.

QtyItemRatingVoltageEnclosureBusNotes
1Generator switchboard2500A, 65 kAIC480Y/277V 3Ø 4WNEMA 1Tin-plated aluminum3 Siemens WL 1200A generator breakers (two generators and a temporary generator), LSIG with Dynamic Arc Flash Sentry, 100% rated; 5 Siemens 3VA distribution breakers, 200A to 800A; motor operator; Kirk-key interlocks specified; 240kA surge protective device; digital meter; UL 891 low-voltage
12Panelboard250A MCB, 42 circuits415V 3Ø 4WNEMA 1Fourteen 60A 3-pole branches; branch-circuit monitoring
24Remote power panel225A MCB, 65 kAIC main208Y/120V 3Ø 4WNEMA 1Thirteen 60A 3-pole branches rated 10 kAIC; no branch-circuit monitoring
4Remote power panel225A MCB, 42 circuits208Y/120V 3Ø 4WNEMA 1Fourteen 60A 3-pole branches; branch-circuit monitoring

03 · Status

Where it stands

Placed · Sep 2026
Order
In progress · Sep 2026
Engineering
Pending
Fabrication & bus bar
Pending
Assembly
Pending
QC
Expected ship Q4 2026
Shipped

Engineered, fabricated and assembled under one roof in Jurupa Valley, California.

As of September 2026 the generator switchboard is in engineering: DEI issued its submittal that month, and the quoted lead time is 10 weeks from the signed submittal. The panel package is at the order stage, with engineering next.

Status as of September 2026, from DEI’s build records.

DEI’s facility in Jurupa Valley, California
Photographed at DEI’s shop, Jurupa Valley, California.

04 · Specifications

Specifications, build by build

Order A — 2500A generator switchboard, 480Y/277V, aluminum bus

From DEI’s submittal, Sep 2026

QtyItemRatingVoltageEnclosureBusNotes
1Generator switchboard2500A, 65 kAIC480Y/277V 3Ø 4WNEMA 1Tin-plated aluminum3 Siemens WL 1200A generator breakers (two generators and a temporary generator), LSIG with Dynamic Arc Flash Sentry, 100% rated; 5 Siemens 3VA distribution breakers, 200A to 800A; motor operator; Kirk-key interlocks specified; 240kA surge protective device; digital meter; UL 891 low-voltage
  • UL 891 low-voltage switchboard, 2500A, 480Y/277V, 3-phase 4-wire, 65 kAIC, NEMA 1 indoor
  • Tin-plated aluminum bus sized for a 65°C maximum temperature rise, braced for 65 kA; aluminum ground bus
  • 3 Siemens WL 1200A breakers for two generators and a temporary generator: LSIG with Dynamic Arc Flash Sentry (arc-energy reduction per NEC 240.87), 100% rated, specified at 100 kAIC
  • 5 Siemens 3VA distribution breakers, 200A to 800A, LSIG, 100% rated
  • Motor operator; Kirk-key interlocks specified; auxiliary contacts on every breaker
  • 240kA surge protective device; digital meter
  • Eight-section lineup; top conduit entry; front-accessible terminations; ANSI 61 light gray finish
  • Start-up services included
  • Quoted lead time: 10 weeks from the signed submittal
QtyItemRatingVoltageEnclosureBusNotes
12Panelboard250A MCB, 42 circuits415V 3Ø 4WNEMA 1Fourteen 60A 3-pole branches; branch-circuit monitoring
24Remote power panel225A MCB, 65 kAIC main208Y/120V 3Ø 4WNEMA 1Thirteen 60A 3-pole branches rated 10 kAIC; no branch-circuit monitoring
4Remote power panel225A MCB, 42 circuits208Y/120V 3Ø 4WNEMA 1Fourteen 60A 3-pole branches; branch-circuit monitoring
  • 12 × 250A main-breaker panelboards, 415V, 3-phase 4-wire, fourteen 60A 3-pole branches (42 circuits), branch-circuit monitoring
  • 24 × 225A main-breaker RPPs, 208Y/120V, 3-phase 4-wire, 65 kAIC main, thirteen 60A 3-pole branches rated 10 kAIC, no branch-circuit monitoring
  • 4 × 225A main-breaker RPPs, 208Y/120V, 3-phase 4-wire, fourteen 60A 3-pole branches (42 circuits), branch-circuit monitoring
  • All NEMA 1, indoor

05 · Related

Related case studies

Send us your one-line diagram — we'll tell you what we'd build, and when.

Company names identify who DEI’s orders are for. Their use does not imply endorsement of DEI.

Dates, quantities and turnarounds as of September 2026, from DEI’s build and order records. Images are representative unless marked otherwise.

About Us

Contact Us

Office Location

4725 Troy Ct.
Jurupa Valley CA 92509

Contact Info

Phone: +1 (866) 773-8050
Email: sales@deipower.com

The Importance of UL 891 Switchgear in Modern Facilities

The Future of Switchgear in Data Centers