Advertisement
Instruction Booklet IB48091
Effective October 2022
Section 3: Installation
3.1 Procedure of bolting the enclosure to ground
Refer to the following figures and tables for information .
Figure 10. Footprint and lag-down bolt locations.
a These are the locations of 0 .88-inch (25 .4 mm) diameter mount-
ing holes for securing the equipment enclosure to a finished
foundation . Use 0 .50-inch (12 mm) diameter SAE Grade 5 hard-
ware tightened to 70 ft-lb (94 N m) is recommended .
Use of other post-installed mechanical anchor systems, bonded/
adhesive type systems, pre-installed cast-in-place systems such
as shear lugs, L -bolts and J-bolts, or plug welding the equipment
vertical section at the mounting hole locations to cast-in-place
structural steel materials or to a steel house foundation is sole
responsibility of others . Alternative mounting systems must
have equal or greater average ultimate tensile and shear load
capabilities as SAE Grade 5 hardware . In addition to the load
capabilities of the mounting system, the bearing strength and
bearing surface area at each unit vertical section mounting hole
location must be considered . Consult a licensed structural or
civil engineer prior to selecting a mounting system if a system
other than that recommended is preferred .
10
EATON www.eaton.com
Instructions for Eaton's AMPGARD
NEMA 3R motor control center
b This is a medium-voltage cable conduit entry location when
entering from the floor . See shop order floor plan for recom-
mended conduit locations . Conduit projection must not exceed
2 .00 inches (50 .8 mm) .
c Location of low-voltage control conduit wiring opening . Conduits
are limited to a projection of 1 .00 inch (25 .4 mm) above the
finished floor . Maximum conduit size is 1 .25 inches (31 .8 mm) .
d This is a medium-voltage cable conduit entry location in an
incoming line vertical section when entering from the floor .
See shop order floor plan for recommended conduit locations .
Conduit projection must not exceed 2 .00 inches (50 .8 mm) .
®
Advertisement
