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Rockwell Automation Publication 2100-IN012G-EN-P - August 2016
Chapter 2
Installation Procedures
Joining and Splicing MCCs
with ArcShield
In addition to the horizontal, neutral (if required), and ground bus splicing
kits, CENTERLINE MCCs with arc-resistant ratings have these additional
requirements:
• MCCs with the 100 ms arc-resistant rating have a back-corner baffle at
the end of each lineup and insulation on the side closing-plate at the end
of the lineup. They also have external vertical support angles at each end
of the lineup.
• MCCs with the device-limited rating have insulation on the horizontal
bus side closing-plates at each end of the lineup.
Installing and Joining Pull
Boxes
When pull boxes are supplied with your MCC, refer to Installing a Pull Box on
a Bulletin 2100 Vertical Section, publication
, for installing and
joining the pull box onto the vertical section.
Joining and Splicing NEMA
Type 12 MCCs
NEMA Type 12 MCCs must be properly installed to prevent the ingress of
dust and dirt. Follow the caulking instructions in the NEMA Type 12 Sealing
Instructions, publication
, supplied with the NEMA 12 MCC.
Use caulk to close any mounting holes in the bottom plates and bolt holes
between shipping splits.
It is necessary that all door latches and wireway doors be fully latched to
prevent dust and dirt from entering the enclosure and to meet NEMA Type 12
requirements.
Joining and Splicing NEMA
Type 3R and Type 4 MCCs
A main horizontal bus, a neutral bus (if required) and a ground bus splice kit
must be installed between the internal sections for new and existing NEMA
Type 3R and Type 4 MCCs. Refer to CENTERLINE 2100 Motor Control
Centers Joining and Splicing Vertical Sections Instructions, publication
, for splicing Type 3R and Type 4 internal sections.