Providing the Highest Level of Customization Available to the North American and LATAM Markets.

E+I Engineering’s UL891 switchboard is a fully customizable solution designed to improve efficiency, enhance safety and save space.  All solutions are custom built using a modular design that can be configured to suit project requirements. In house metalwork fabrication and paintwork facilities ensure that E+I Engineering can deliver a high quality and efficient solution for any specification.

Switchboards are engineered using our proven IEC 61439 technology for enhanced safety and has been fully tested and certified to comply with UL891 standards.


Available in ratings up to 6000A

Type tested arc prevention busbar systems

Incorporation of life safety protection relays and interlocks

Seismically tested and certified

Close coupled transformer


Fully extendable modular system with reduced footprint designs including high density device stacking

Full access to all busbar connections for maintenance and thermal imaging surveys

Incorporation of in-house PLC programming and energy monitoring equipment

Component and metering options from all leading manufacturers


Rated Voltage

Up to 600V

Rated current (A)

Up to 6000A

Rated Peak Withstand Current (kA)

Up to 100kA

Rated Short-time Withstand (1s) (kA)

Up to 100kA

Circuit Breaker

UL1066 & UL489 individually and/or group mounted construction


NEMA 1 gasketed


UL891 Range