Multiple Disconnect Safety System Installation and Operating Instructions
950-001568-000 Rev A
25
Chapter 3: Installation Procedure
Close and fasten the door prior to positioning the enclosure. Use a crane to
move the enclosure into position. Secure the appropriate screws or connectors
to attach the enclosure to the base.
CAUTION
CAUTION
The MDSS may be unstable when being moved. Use of the eyebolts when
moving the enclosure is recommended.
Upon completion of the enclosure mounting and the conduit connections, the
enclosure must comply with the tests specified in the applicable sections of the
Enclosure Types Table of UL 50, “Standard for Enclosures for Electrical
Equipment.”
Preparing the Cutouts
Refer to the project drawings to identify specific locations of incoming wiring
and to determine appropriate cutouts in the enclosure, if required.
The preferred point of entry for the cables is through the bottom. If cables come
through the bottom of the enclosure, you can remove one, two or all three of the
bottom gland plates (shown in
), slide one plate on top of the others, or
cut the panels.
NOTE
The strut on the single-column models and the optional dead front may present
interference when bringing cables through the bottom.
If cables are coming from a different area, the sides and rear of the enclosure are
also available for cutouts, as shown in
(double-stacked models),
(single-column models). The
cutouts can be done either before or after the enclosure is mounted.
CAUTION
CAUTION
As the installer, you are responsible for determining safe areas in the enclosure
for cutouts.
Use only water-tight conduit fittings to connect the conduit to the cutouts. All
hubs must comply with the requirements of a NEMA-3R enclosure, as specified
in UL 514B, “Standard for Safety Conduit, Tubing and Cable Fittings.”
Be sure enough wire-bend space exists for the desired output wire gauge when
choosing a conduit location.
Making cutouts may leave steel shavings or spatter.
