Generator Tap Box and Boxes, Generator Connection Boxes and Generator Connection Panels are intended for use as a temporary service connection point between portable power units and the facility service entrance. When normal utility power is interrupted for long periods of time (natural disaster, utility system failure, etc.), tap boxes may become necessary to bring in portable generators to provide power or augment emergency generator sets.
Generator Tap or Connection Box Design
The Union Connector Generator Tap Boxes and Generator Connection Boxes are UL Listed, with all the appropriate features for connecting portable power units (generators) to facility power distribution systems. A standard GCP consists of a Type 3R enclosure, a means for portable cable connection and copper bussing for connection to facility wiring. The generator tap box enclosure has a hinged door for portable cable access located on the bottom of the enclosure as well as a front door for worker access to the bus connection points. Both doors on the generator tap boxes and/or generator connection panels can be locked.
Portable cable connection can be accomplished with Series 16 Cam inlets, mechanical lugs or compression lugs. Standard ampacity ratings range from 100A. to 3200A. in both single phase ( 120V., 120/240V. ) and three phase ( 120/208V., 480V. and 277/480V. ). Standard building wire termination is to dual-rated mechanical lugs. Use of compression lugs on building wire is an option.
Generator Tap and Connection Box Inputs
Series 16 Cam Inlets
Series 16 Cam inlets can be provided for portable cable connection to the facility or facility switches. These connectors are standard, inexpensive and familiar to generator operators. The “series 16 cams” are mounted inside a Type 3R or 4X enclosure with a hinged door for portable cable access located on the bottom of the enclosure.
Quick, safe connection of portable cables by qualified personnel is through this hinged door. The front door can be secured with a padlock for added security and the facility can now be safely brought back online.
Posi-Lok™ Inlet Panels
Posi-Lok™ Inlet Panels can be provided for portable cable connection to the facility or facility switches. Posi-Lok™ panels are part of a Sequential interlock system that requires the user to connect and disconnect each plug in sequence.
Cross-phasing is eliminated and “make-first / break-last” Ground connection is guaranteed. Cable connectors are similar to Series 16 devices, but are provided with a polarizing shield that keys each plug to the correct receptacle. Panels are UL Listed and rated 3R. Posi-Lok™ panels are frequently used for power distribution to waste water treatment facilities and for industrial/dockside applications.
Mechanical Lugs can also be used for termination of generator portable cable to internal bus bars. Appropriately sized dual-rated mechanical lugs can be mounted on the bus bars for easy connection of “bare ended” cable.
Compression Lugs on portable cable can be used for direct connection of portable cable. These lugs are bolted to the bus bars by using pre-drilled holes in the bars. The bus bars are located in a cable connection chamber behind a locking hinged door. This acts a dead front cover to protect live/energized components.
Standard termination of building wiring to the bus bars is accomplished using dual-rated mechanical lugs. An option is the use of compression lugs.