11
Instruction Booklet
IB01900002E
Effective June 2011
Instructions for Magnum DS Metal-Enclosed
Low-Voltage NEMA 3R Assemblies
EATON CORPORATION
www.eaton.com
Section 4: Installation
WARNING
BEFORE PROCEEDING WITH ANY INSTALLATION, TESTING, START-UP OR
MAINTENANCE, REVIEW ALL OF SECTION 1 FOR SAFETY PRACTICES AND
RECOMMENDATIONS. FAILURE TO DO SO MAY RESULT IN DEATH, SERIOUS
BODILY INJURY OR PROPERTY DAMAGE.
4.1 General Information
This section contains instructions for installing Magnum DS Metal-
Enclosed Low-Voltage Assemblies. Proper installation of Magnum
DS Metal-Enclosed Low-Voltage Assemblies is of prime importance.
Too much emphasis cannot be placed on this phase of the work.
Study the associated instruction manuals and drawings carefully.
CAUTION
PERSONNEL INSTALLING THIS EQUIPMENT MUST BE THOROUGHLY
FAMILIAR WITH ALL ASSOCIATED INSTRUCTION MANUALS AND
APPLICABLE GOVERNING CODES. ADDITIONALLY, ALL DRAWINGS,
WHETHER MECHANICAL OR ELECTRICAL, MUST BE UNDERSTOOD
AND STRICTLY FOLLOWED TO PREVENT POSSIBLE DAMAGE TO THE
SWITCHGEAR OR EQUIPMENT BEING PROTECTED.
4.2 Location and Foundation
Magnum DS Metal-Enclosed Low-Voltage assemblies are con-
structed at the factory on smooth level surfaces to assure correct
alignment of all parts. Extra care by the purchaser in selecting the
location and preparing the foundation will result in reduced installa-
tion costs, as well as good equipment performance.
4.2.1 Location
In general, the location will have been determined during the speci-
fication and/or procurement phases. Certain locations may impose
requirements which must be met so that the switchgear assembly
may operate efficiently with the least amount of maintenance.
Consideration must be given to the open space required at the front
and rear of the equipment, space at the ends of the lineup, and the
characteristics of the environment.
The space at the front must be sufficient to meet applicable codes,
permit the opening of doors, the insertion and withdrawal of circuit
breakers, and the transfer of circuit breakers to other compartments
by means of an overhead lifter or portable lifting device. In rear-
accessible enclosures, the space at the rear must be sufficient to
meet local codes, permit ventilation, open rear doors, install cables,
inspect equipment and perform maintenance.
4.2.2 Foundation
The site foundation should be smooth and level (within 1/8 inch per
three feet [3.5 mm/meter] in any direction) to avoid distortion of the
structure. The lifting plates attached at the base perform the dual
purpose of providing a convenient and robust method of securing
the unit to the foundation. A separate channel base is not required.
Once the assembly is in its permanent location remove the lifting
eyes from the angles (Figure 2). Rotate the angles 180 degrees and
reinstall. Use the holes in the angles to bolt the assembly to the
foundation. For further details see the foundation plans provided
with the equipment.
4.2.3 Conduits
Provisions must be made in the site foundation for all conduits
entering from below. Specific floor plan details provided with the
equipment must be used to determine the final conduit layout and
footprint required for each lineup (See Base Plan reference drawing
4A37896).
Power conduits should project above the finished floor not more
than ten inches (254 mm) for one of these assemblies. Control wire
conduits should not extend higher than nine inches (228 mm). It will
simplify moving the shipping section groups into place if the con-
duits are flush with the concrete surface and appropriate extension
sleeves added after the units are in their final location. See Base
Plan reference drawing 4A37896 supplied with the assembly for bot-
tom entry conduit space and location.
4.3 Shipping Section Group Assembly
Before connecting the separate shipping sections of the assembly,
all components should be available at the site location. The prepared
foundation should be ready and all embedded conduits installed and
capped.
CAUTION
PRIOR TO INSTALLATION AND ASSEMBLY, BE CERTAIN THE FOUNDATION
IS LEVEL AND FREE OF ANY DEBRIS TO PREVENT EQUIPMENT DAMAGE.
4.3.1 Preparation of the Unit for Assembly
Magnum DS NEMA 3R Assemblies are shipped with external ship-
ping braces attached to prevent distortion of the unit during trans-
port. These braces may be a length of aluminum angle, a steel
support as shown in Figure 7, or both depending upon the enclosure
type. Any such brace attached is temporary and should be removed
and discarded prior to connecting the shipping sections.
Roof seams are covered by a welded seam cover. These are
shipped attached to the enclosure roof for convenience. Prior to
joining shipping sections, remove the seam cover from any shipping
section where it overhangs, similar to as shown in Figure 8. Remove
the securing hardware and retain for reinstallation after the units are
connected and secured per the instructions below.
Also remove any packing cardboard, including cardboard on aisle-way
floors, prior to installation.
Figure 7. Temporary Shipping Brace on Walk-in Aisleway.
