Figure 4.31 Typical Ground Joining
4.6.3 Cable Connections
Cable connections are used as the primary form of power entering and leaving the switchboard. Cable connections require
mechanical or compression lugs to connect the cable to the provided field termination lug pads (see Figure 4.32 below ).
NOTE: Vertiv not responsible for providing the lugs, but does supply the lug landing pads for mounting. Vertiv will
supply standard lug pads for all amperages, custom pads can be supplied on a per project basis.
Refer Typical Customer Connections on page5 for types or supplied documentation if custom pads are requested. Apply
torque settings for hardware as set forth inTable 7.1 on page43 .
Figure 4.32 Lug Types
Cables may enter or exit through the top and/or bottom of the switchboard. These areas are identified with an aluminum
gland plate on top or inside of the switchboard. Additional entry and exit locations can be used, these will be determined on a
per project basis. Consult the manufacturer’s drawings for conduit/ glanding areas for the specific project.
Once the conduit and cable have been fixed to the switchboard, the cable should be bent in the sections provided. Bundle the
cables and identify them by specific phase and neutral, if applicable. When bending the cable, make sure no insulation is
forced permanently against a sharp metal edge, this could potentially cause damage. In most cases, cable supports should be
present so that the cables can be secured.
The installer must strip the cables insulation to sufficiently fill the entire barrel of lugs being used. Ensure that no strands
inside the cable are damaged and that all are of equal length before inserting into the lug. Do not strip off more insulation than
required to fit into the lug, as exposed strands could compromise required spacings.
36 Proprietary and Confidential ©2024 Vertiv Group Corp. 4 Installation
Vertiv™ UL891 Switchboard Installer/User Guide
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