I N S TA L L AT I O N , O P ER AT I O N S A N D M A I N T EN A N C E M A N UA L
15
Installation 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.
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08
—
08
Control center floor sills
grouted to the floor
before installation to
provide a level foundation
Note:
Cannot be rolled (as in Figure 20) without
floor sills.
Surface under motor control center base must be
of non-combustible material unless bottom covers
are installed in each vertical section.
The overall height of the equipment should be
considered with respect to headroom, top conduit
entry space and alignment with other equipment.
Note:
• If anchor bolts are to be imbedded in
the foundation, they must be located
according to the drawing for the specific
equipment. Locate one in the center front
and one in the center back. Anchor bolts
should be 1/2" in diameter, of Grade 2
steel (minimum) in non-seismic locations.
Bolts must extend a minimum of 2 11/32"
above grade to 3/4" above the channel sill.
If 13" (330.2mm) deep sections are used,
anchor bolts or some form of external
bracing is required.
• Seismic Zone 4/IBC testing was
performed using 1/2" – 13 Grade 5 bolts,
torqued to 50 foot-pounds, located in
each of the four corners in each section.
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09
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09
Installing steel
floor members
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.
Note the front alignment of the
13-inch-deep section.
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