In September 2026 MC Electric ordered one outdoor 600A switchboard section from DEI for Rivian: the utility pull section, which receives the serving utility’s service conductors and houses a CT compartment laid out to that utility’s requirements.
02 · Build
What DEI built
A 600A UL 891 low-voltage switchboard section at 480Y/277V, three-phase four-wire, 65 kAIC, in a NEMA 3R outdoor enclosure finished in ANSI 61 light gray. Its tin-plated aluminum bus carries 600A on each phase and the neutral and is braced for 65 kA RMS symmetrical. As the utility pull section it takes bottom conduit entry, keeps every termination reachable from the front, and houses the serving utility’s CT compartment and meter socket, laid out to that utility’s requirements.
Qty
Item
Rating
Voltage
Enclosure
Bus
Notes
1
Utility pull section with CT compartment
600A
480Y/277V 3Ø 4W
NEMA 3R
Tin-plated aluminum
65 kAIC; full-rated 600A neutral; CT compartment and meter socket laid out to the serving utility’s requirements; UL 891 low-voltage
03 · Status
Where it stands
Done
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 pull section is in engineering: DEI’s submittal for approval is dated September 2026, and production is released once the customer approves it.
Status as of September 2026, from DEI’s build records.
Photographed at DEI’s shop, Jurupa Valley, California.
04 · Specifications
Specifications, build by build
One order — 600A utility pull section
From DEI’s submittal, Sep 2026
Qty
Item
Rating
Voltage
Enclosure
Bus
Notes
1
Utility pull section with CT compartment
600A
480Y/277V 3Ø 4W
NEMA 3R
Tin-plated aluminum
65 kAIC; full-rated 600A neutral; CT compartment and meter socket laid out to the serving utility’s requirements; UL 891 low-voltage