Rockwell Automation 1512A MV Controllers, 400A One-High Cabinet, Standard and Arc-Resistant Enclosure - Manual (Page 27)

Rockwell Automation Publication 1512A-UM100F-EN-P - May 2013 19
Installation – Arc-Resistant (ArcShield) Chapter 3
NOTES FOR SEISMIC APPLICATIONS
• For installations on concrete – the minimum depth and radius of
concrete supporting the cabinet anchors is dependent on seismic loads.
Refer to important information above.
• For installations on a metal structure – the metal plate depth and cabinet
anchoring method is dependent on seismic loads.
Joining Sections
1. Remove the side bus access covers if applicable.
2. Position the left side section on a level surface and secure the section in
place with 12 mm (1/2 in. [M12]) floor mounting bolts (refer
to
Anchoring on page 17 ).
3. When joining ArcShield sections, apply a continuous 3 mm (1/8 in.) wide
bead of silicon sealer around the entire outer perimeter of one section
AND around the cutout for the power bus.
4. Position the right section against the left section. Ensure that the surface is
level.
5. Secure the sections together using the 1/4-20 self-tapping screws. Thread
the screw through the 7 mm (0.281 in.) clearance hole to the
corresponding 6 mm (0.219 in.) pilot hole. To access the rear clearance
holes remove the rear covers of the starter. If rear access is not available,
refer to
Front Access – Bottom Incoming Cables (Bottom Entry/Exit) on
page 22 or Front Access – Top Incoming Cables (Top Entry/Exit) on
page 24 .
6. Use the provided 1/4-20 thread fasteners to secure the entire perimeter of
the horizontal bus. Ensure there is a continuous bead of silicone seal
around the bus bar opening on one cabinet.
7. Secure the right section to the floor using 12 mm (1/2 in. [M12]) floor
mounting bolts (refer to Anchoring on page 17 ).
TIP Joining hardware can be found in a package mounted to the front of the
shipping skid. Refer to publication MV-QS050_-EN-P for level floor surface
requirements.
TIP ArcShield units at the end of a line-up have a ground connection to the
outside side bus access cover (see
Figure 25 and Figure 26 ). This
connection must be maintained to ensure unit arc resistant
performance.