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IB140058EN
Instructional Booklet
Page
10
Effective: March 2016
O&M Manual for 30-1000 Amperes
Manual Transfer Switch
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. 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 electri-
cal checks are outlined in Section 6 of this instruction bulletin.
4.2 Mounting Location
Choose a location that offers a flat, rigid mounting surface capa-
ble 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 environ-
ments. If there are any doubts as to location suitabil- ity, discuss
it with your Eaton representative.
Check to make certain that there are no pipes, wires or other
mounting hazards in the immediate mounting area that could cre-
ate 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 mount-
ing. Be especially alert for distorted metal, loose wires or dam-
aged 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 bot-
tom 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
TO FACILITATE THE PROCEDURES DESCRIBED IN THIS SECTION,
THE SOLID STEEL SHIELD OVER THE POWER PANEL SHOULD BE
REMOVED. THE SHIELD IS ATTACHED TO THE RATCHET ASSEM-
BLY WITH FOUR SCREWS. REMOVE THE FOUR SCREWS AND
SHIELD UNTIL THE PROCEDURES ARE COMPLETED.
WARNING
BE CERTAIN THAT THE SOLID STEEL POWER PANEL SHIELD IS
PROPERLY INSTALLED BEFORE THE TRANSFER SWITCH EQUIP-
MENT IS PUT INTO SERVICE. THE SHIELD PROVIDES PROTECTION
FROM DANGEROUS VOLTAGES AT THE LINE AND LOAD TERMI-
NALS WHEN THE EQUIPMENT IS IN OPERATION. FAILURE TO DO
SO COULD RESULT IN PERSONAL INJURY OR DEATH.
CAUTION
SINCE THE ENCLOSED ATS 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 CONTAMI-
NANTS WHEN MAKING THE CABLE ENTRY HOLES. EXTREME CARE
SHOULD ALSO BE TAKEN WHEN MOUNTING THE ENCLOSURE TO
PREVENT COMPONENT DAMAGE OR A FUTURE MALFUNCTION.
