Generator Connection Boxes


J Custom is pleased to announce a new addition to our line of custom power distribution panels. Our line of Generator Connection Boxes (“GCB” ), is designed to allow quick and safe connections of portable generators to a building or facility.

Features and Benefits:

  • 200 Amp or 400 Amp service / Single or Three Phase / 240 or 480 volts
  • The Generator Connection Box incorporates a patent-pending safety/security feature, preventing access by unauthorized parties to the connectors when cables are connected
  • Color coded connectors  ensure quick phase identification (Brown, Orange and Yellow phase colors available for 480 Volts)
  • NEMA 3R rated, connected or disconnected
  • Spring loaded NEMA 3R rated cap covers for all power connectors, ensuring safety and reliability 
  • Quick access cable entry door with lockable controlled access to cable connections 
  • Door stay holds door open in windy conditions
  • UL 1008 Listed

The GCB series is currently available in five distinct configurations, click on the links below for detailed specifications:

Custom designed GCB units can be provided in styles capable of handling up to1600 Amps and the enclosure can be customized to meet your specific environmental and configuration needs.

Generator Boxes ( Total = 5 )
Single Phase 200 AMP 120/240 Volts Generator Connection Box

Single Phase 200 AMP 120/240 Volts Generator Connection Box

GCB-2-1P-240
$1.00
Three Phase 200 AMP 120/240 Volts Generator Connection Box

Three Phase 200 AMP 120/240 Volts Generator Connection Box

GCB-2-3P-240
$1322.00
Three Phase 200 AMP 240/480 Volts Generator Connection Box

Three Phase 200 AMP 240/480 Volts Generator Connection Box

GCB-2-3P-480
$1322.00
Three Phase 400 AMP 120/240 Volts Generator Connection Box

Three Phase 400 AMP 120/240 Volts Generator Connection Box

GCB-4-3P-240
$1550.00
Three Phase 400 AMP 240/480 Volts Generator Connection Box

Three Phase 400 AMP 240/480 Volts Generator Connection Box

GCB-4-3P-480
$1550.00