Instructional Booklet
Page
12
Effective: July 2010
ATC-100 Contactor Based Transfer Switch
For more information visit: www.eaton.com
IB01602017E
Power cables are to be connected to solderless screw type lugs
located on the ATS switching devices. Refer to the separate Cus-
tomer Wiring Booklet 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 4.
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.
Tighten the cable lugs to the torque identified on the label affixed
to the door of the unit.
4.5 Wiring
Power sources, load conductors, and control wiring should be
connected to locations as indicated in the Customer Wiring Book-
let supplied with the ATS equipment.
Once the ATS equipment has been installed and wired, perform
the initial mechanical and electrical procedures as outlined in Sec-
tion 6 to verify that the equipment is installed and operating prop-
erly.
Table 4. Transfer Switch Equipment Wire Size
WARNING
IMPROPER POWER CABLE CONNECTIONS CAN CAUSE EXCESSIVE
HEAT AND SUBSEQUENT EQUIPMENT FAILURE.
WARNING
POWER CONDUCTORS AND CONTROL WIRING MAY HAVE VOLT-
AGE PRESENT THAT CAN CAUSE SEVERE PERSONAL INJURY OR
DEATH. DEENERGIZE ALL POWER OR CONTROL CIRCUIT CONDUC-
TORS BEFORE BEGINNING TO PERFORM ANY WIRING ACTIVITY TO
OR WITHIN THE ATS EQUIPMENT.
CAUTION
ENSURE THE ATC-100 VOLTAGE IS SET CORRECTLY. IT SHOULD
BE THE SAME AS THE UTILITY AND THE GENERATOR LINE VOLT-
AGES. OPERATING THE EQUIPMENT ON IMPROPER VOLTAGE CAN
CAUSE EQUIPMENT DAMAGE.
TRANSFER SWITCH AMPERE RATING
WIRE SIZE RANGES
NUMBER OF CABLES PER PHASE
TERMINAL TEMPERATURE RATING °C (°F)
30-100
#14-3/0
1
75 (167)
150
#6-300KCMIL
1
75 (167)
225-300
#3-350KCMIL
1
75 (167)
400
#3-350KCMIL
2
75 (167)
600
#1-500KCMIL
2
75 (167)
800-1200
#3/0-500KCMIL
4
75 (167)
