GE Industrial Solutions Evolution Series E9000 - Manual (Page 8)

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Evolution Series E9000 Installation & Maintenance Guide
Figure 7C. Low bus position of ground and neutral bus (minimum
available space for conduit entry) in 13-inch deep section, 6-inch cover.
Figure 7D. Upper position of ground and neutral bus (maximum
space available for conduit entry), 6-inch bottom cover.
Preparation of Flooring
For most installations, the MCC floor sills can rest on the
finished floor. The foundation for the equipment should
be level and even. Although not normally required, the
purchaser may elect to install, level and grout the steel
members or MCC floor sills in the floor, as illustrated in
Figure 8 and Figure 9. If the floor sills are removed, lifting
and moving the shipping sections must be done carefully.
Figure 8. Control center floor sills grouted to the floor before
installation to provide a level foundation
Note: Cannot be rolled (as in Figure 5) without floor sills
The overall height of the equipment should be considered
with respect to headroom, top conduit entry space and
alignment with other equipment.
If anchor bolts are to be imbedded in the foundation,
they must be located according to the drawings furnished
by GE for the specific equipment. For 13-inch (330.2
mm) deep vertical sections, anchor bolts or some form
of external bracing is required. Anchor bolts should be
1/2-inch diameter of Grade 2 steel (minimum).
Figure 9. Installing steel floor members
Note the front alignment of the 13-inch-deep section
Positioning and Joining Sections
If groups of sections are to be joined together in a final
lineup, remove the end cover plates and the plug buttons,
from the sides of the sections to be joined. Figure 10
shows the side views, with the end cover plates
removed, for 20-inch-deep sections with 2-inch (50.8
mm) and 4-inch (101.6 mm) bus bars.
Carefully check and remove dirt, dust or bits of packing
material from the interior of all sections. Use a brush,
soft cloth or vacuum cleaner.
Surface under motor control center base must
be of non-combustible material unless bottom
covers are installed in each vertical section.
If there are vertical sections of varying depths
(such as 13, 20, or 22 inches) in a single lineup,
the fronts of the sections must be lined up for
proper alignment of the main bus bars.
Figure 9 illustrates this point.