Rockwell Automation 1512A MV Controllers, 400A One-High Cabinet, Standard and Arc-Resistant Enclosure - Manual (Page 90)

82 Rockwell Automation Publication 1512A-UM100F-EN-P - May 2013
Appendix B ArcShield Plenum Installation Instructions
STEP 7 – Additional
Mounting Support The Extension/Elbow Assembly must have additional mounting support.
90° Elbow Section: Approximate weight 64 kg (142 lb)
36 in. Extension Assembly: Approximate weight 51 kg (112 lb)
Figure 83 shows an example of how the Extension/Elbow Sections can be
supported by suspension from a high ceiling. Points A, B & C show where chains
or high tension cables may be connected.
Figure 83 - Completed Assembly for optional vertical exit Plenum (Right hand exit)
A B C
TIP During an arc fault, the plenum will be subjected to a brief high pressure shock
wave. The Extension/Elbow assembly may experience dynamic loading. It is
important to account for dynamic loading when selecting supporting means
and materials.