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IB01602007E
Instruction Bulletin
Page
14
Effective: June 2003
O&M Manual for
Non-Automatic Transfer
Switches (30 – 1200 Amperes)
Section 4: Installation and Wiring
4.1 General
Transfer switches are factory wired and tested. Installation
requires solidly mounting the enclosed unit and connecting
power cables and auxiliary pilot circuits. Physical mounting
procedures and power cable connections are covered in
this section. All other required wiring or electrical connec-
tion references are covered in a separate
Quick Start Guide
packed with the transfer switch. Locate the wiring booklet,
review it, and keep it readily available for reference purposes
during installation and testing. Once a transfer switch is
properly installed and wired, it should be mechanically and
electrically checked for proper installation and operation.
The procedures for these initial mechanical and electrical
checks are outlined in Section 6 of this instruction bulletin.
To facilitate the procedures described in this section for the
vertical design, remove the solid steel shield over the power
panel. The shield is attached to the ratchet assembly with
four screws. Remove the four screws and shield until the
procedures are completed.
4.2 Mounting Location
Choose a location that offers a flat, rigid mounting surface
capable of supporting the weight of the enclosed transfer
switch equipment. Avoid locations that are moist, hot and/or
dusty. Enclosure designs are, however, available for special
environments. If there are any doubts as to location suitabil-
ity, discuss it with your Cutler-Hammer representative.
Check to make certain that there are no pipes, wires or other
mounting hazards in the immediate mounting area that
could create a present or future problem.
Carefully remove all packing material from the transfer
switch at the mounting location. Even though an equipment
inspection was made when the equipment was received,
make another careful inspection of the enclosure and the
enclosed transfer switch as packing material is removed
and the enclosure readied for mounting. Be especially alert
for distorted metal, loose wires or damaged components.
4.3 Mounting Procedure
All transfer switch equipment enclosures are of the same
design. Only the overall physical dimensions change. The
enclosure is provided with four elongated mounting holes,
two in the top mounting flange and two in the bottom.
If the transfer switch equipment is of the vertical design, the
power panel is provided with two sets of mounting holes.
One set positions the panel for top entry of cables and one
set for bottom entry (Figure 13). This will be covered in more
detail later in Section 4.4 Vertical Design Load Lug Location.
Transfer switch equipment is assembled and supplied as
standard for top entry, although equally adaptable to bottom
entry. Cable entry holes are not part of the enclosure when
shipped from the factory and must be provided in the field,
either before or after mounting the enclosure.
NOTICE
WARNING
BE CERTAIN THAT THE SOLID STEEL POWER PANEL
SHIELD USED WITH THE VERTICAL DESIGN IS PROPERLY
INSTALLED BEFORE TRANSFER SWITCH EQUIPMENT IS
PUT INTO SERVICE. THE SHIELD PROVIDES PROTECTION
FROM DANGEROUS VOLTAGES AT THE LINE AND LOAD
TERMINALS WHEN THE EQUIPMENT IS IN OPERATION.
FAILURE TO DO SO COULD RESULT IN PERSONAL
INJURY OR DEATH.
CAUTION
SINCE THE ENCLOSED TRANSFER SWITCH MUST BE
LIFTED INTO PLACE FOR MOUNTING, BE CERTAIN THAT
ADEQUATE RESOURCES ARE AVAILABLE FOR LIFTING TO
AVOID PERSONNEL INJURIES OR EQUIPMENT DAMAGE.
CAUTION
EXTREME CARE SHOULD BE TAKEN TO PROTECT THE
TRANSFER SWITCH FROM DRILL CHIPS, FILINGS AND
OTHER CONTAMINANTS WHEN MAKING THE CABLE
ENTRY HOLES AND MOUNTING THE ENCLOSURE
TO PREVENT COMPONENT DAMAGE OR A FUTURE
MALFUNCTION.
