Built for Design By Initiative
Sep 2026 – Oct 2026 a six-figure order
Units
Product
Amperage
Voltage
Bus
Enclosure
Interrupting rating
Listing
Breakers
Built in
In September 2026 Design By Initiative ordered 10 identical 4000A main-disconnect switchboards from DEI. Each one houses a single 4000A main breaker on silver-flash copper bus, top and bottom fed, with landings for the line and load conductors. At 4000A, the order sits at the top of the 400A to 4000A range DEI builds.
Each of the 10 units is a UL 891 low-voltage switchboard configured as a 4000A main disconnect: one 4000A breaker with an LSIG electronic trip unit and arc energy reduction mode (NEC 240.87), at 480V three-phase three-wire. The interrupting rating is 65 kAIC, and the bus structure is braced to withstand 65 kA. The silver-flash copper bus is rated 4000A per phase and sized for a 65°C maximum temperature rise, with a copper ground bus. Line and load landings carry eight NEMA hole patterns per phase, and the terminations are accessible from the front. The enclosures are NEMA 1 for indoor use, finished in ANSI 61 light gray.
| Qty | Item | Rating | Voltage | Enclosure | Bus | Notes |
|---|---|---|---|---|---|---|
| 10 | Main-disconnect switchboard | 4000A | 480V 3Ø 3W | NEMA 1 | Copper, silver-flash | One 4000A LSIG main breaker with arc energy reduction (NEC 240.87); top and bottom fed; 65 kAIC; UL 891 low-voltage |
Engineered, fabricated and assembled under one roof in Jurupa Valley, California.
As of September 2026 DEI has drawn the submittal for all 10 switchboards. The customer approves those drawings before production is released, so fabrication, bus bar work, assembly and QC are still ahead.
Status as of September 2026, from DEI’s build records.
From DEI’s submittal, Sep 2026
| Qty | Item | Rating | Voltage | Enclosure | Bus | Notes |
|---|---|---|---|---|---|---|
| 10 | Main-disconnect switchboard | 4000A | 480V 3Ø 3W | NEMA 1 | Copper, silver-flash | One 4000A LSIG main breaker with arc energy reduction (NEC 240.87); top and bottom fed; 65 kAIC; UL 891 low-voltage |
4000A meter-main service
UL 891 low-voltage meter-main switchgear at 480Y/277V, 65 kAIC, with utility metering and protective relaying.
Delivered Sep 2026
3 switchboards for sites on three islands
A 3000A meter-main, a 2000A service switchboard and a NEMA 4X stainless solar board for three projects in Hawaii.
Jun 2026 – Oct 2026
14 to 24 days, order to shipment or pickup
Three switchboard jobs, 400A to 1200A, each shipped or ready for pickup in under four weeks.
Delivered Sep 2026
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.
Office Location
4725 Troy Ct.
Jurupa Valley CA 92509
Contact Info
Phone: +1 (866) 773-8050
Email: sales@deipower.com
