IB140015EN
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Instructional Booklet
Effective: August 2014
Page
17
ATC-900 Magnum Tranfer Switch O & M Manual
4.4 Mounting Procedure
With the enclosed transfer switch equipment unpacked and ready
for mounting, proceed with the following steps:
Step 1:
Mounting and cabling access is best provided by remov-
ing side and rear covers (when applicable). See Section
9.3 for cover removal instructions.
Step 2:
Gently maneuver the switch into its location using all of
the supplied lift brackets.
Step 3:
Bolt the enclosure to the base. Use separate cleats
(Option 42 only) if Seismic Uniform Building Code (UBC)
Zone 4 certification is desired (Figure 20), and secure
with 1/2-13 UNC Grade 5 hex bolts. Seismic per IBC
2009, CBC2010, OSHPD OSP-0014-10 (3200 A and
below). See the Outline drawing (xxxx.O001) for specific
mounting areas for the switch as well as the Bypass type
switch.
Step 4:
Tighten bolts to 50 ft-lbs (68 Nm).
Step 5:
Double check to ensure that all packing and shipping
material has been removed
.
Figure 20. Seismic Tested and Approved Product Mounting
Instructions.
4.5 Power Cable Connections
Test all power cables prior to connection to the unit to ensure that
the conductors or cable insulation have not been damaged while
being pulled into position.
Power cables are to be connected to solderless screw type lugs
located on the ATS switching devices. Refer to the separate cus-
tomer wiring diagram supplied with the ATS equipment for power
termination. Verify that the lugs supplied will accommodate the
power cables being used. Also verify that the cables comply with
local electrical codes. Standard ATS equipment, as supplied from
the factory, will accommodate the wire sizes shown in Table 5.
Carefully strip the insulation from the power cables to avoid nick-
ing or ringing of the conductor strands. Prepare the stripped con-
ductor termination end by cleaning it with a wire brush. If
aluminum conductors are used, apply an appropriate joint com-
pound to the clean conductor surface area.
Wrap line cables together with nominal 3/8 inch nylon rope or
rope having tensile strength of 2,000 pounds.
Wrap at 4 inches and 15 inches from the line terminals with 8 and
18 wraps respectively or every 1 inch with 1 wrap.
Repeat the above for the load cables.
NOTICE
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.
WARNING
POWER CONDUCTORS MAY HAVE VOLTAGE PRESENT THAT CAN
CAUSE SEVERE PERSONAL INJURY OR DEATH. DE-ENERGIZE ALL
POWER OR CONTROL CIRCUIT CONDUCTORS TO BE CONNECTED
TO THE TRANSFER SWITCH EQUIPMENT BEFORE BEGINNING TO
WORK WITH THE CONDUCTORS AND/OR TERMINATING THEM TO
THE EQUIPMENT.
CAUTION
USE OF CABLE LUGS NOT DESIGNED FOR THE TRANSFER SWITCH
APPLICATIONS MAY CAUSE HEATING PROBLEMS. BREAKER LUGS
ONLY MOUNT TO THE BREAKER, WHILE TRANSFER SWITCH LUGS
MOUNT TO BOTH THE BREAKER AND THE BUS BAR BEHIND THE
BREAKER. FOR INSTALLATION INSTRUCTIONS, REFER TO THE
INSTRUCTION LEAFLET SUPPLIED FOR THE SPECIFIC LUGS.
CAUTION
TO HELP PREVENT COMPONENT DAMAGE OR FUTURE MALFUNC-
TIONS, USE EXTREME CARE TO KEEP CONTAMINANTS OUT OF THE
TRANSFER SWITCH EQUIPMENT WHEN MAKING POWER CABLE
CONNECTIONS.
CAUTION
RUN THE POWER CABLE THROUGH THE GUTTER SPACE PROVIDED
IN THE REAR OF POWER COMPARTMENTS.
