Rockwell Automation 2500 CENTERLINE MCC Joining and Splicing Columns - Manual (Page 16)

Publication 2500-IN004A-EN-P - August 2009
16 CENTERLINE 2500 Motor Control Centers Installing, Joining and Splicing Columns
Splicing the Power Bus
Power bus consists of the main horizontal bus and neutral bus (if
present). Based on the current rating of the power bus, the splice kit
contains the appropriate splice bars and corresponding hardware. The
following procedures describe methods for splicing power bus based
on the ampere rating of the busbars.
For additional splicing information related to specific MCCs, refer to
the elevation drawing shipped with the MCC in the documentation
package.
Accessing the Power Bus
Follow these procedures to access the power bus.
1. To gain access to the horizontal power bus, open the vertical
wireway door to the left of the splice.
2. Identify the primary and secondary splice covers as shown.
ATTENTION
To prevent severe injury or death, de-energize all power sources to the
MCC before joining and splicing columns. Follow local codes and
guidelines in addition to the requirements of EN 50110.
IMPORTANT
When splicing the horizontal power bus, always begin splicing from
the lowest phase busbar and work from the bottom up.
IMPORTANT
NOTE for NO-OX-ID – Do not get any busbar corrosion inhibitor on the
bus splicing hardware. It will not allow the hardware to be properly
torqued. Damage may occur.
TIP
You might have to remove units and unit support pans to provide
access to splice the power bus.