Install Manual

Installation
10 Automatic Transfer Switch Owner’s Manual
Figure 3-1. Open Enclosure
Connecting Utility and Standby Power
Sources
Installation and interconnection diagrams are provided in
this manual.
NOTE: All installations must comply with national, state
and local codes. It is the responsibility of the installer to
perform an installation that will pass the final electrical
inspection.
1. Remove the finger safe barrier covers and then
connect utility supply at the utility service
disconnect circuit breaker terminals N1 and N2.
Follow torque specifications listed on the circuit
breaker.
2. See Figure 3-2. Connect utility neutral conductor
to the neutral terminal bar. The grounding
electrode conductors can be connected to the
equipment grounding terminal bar (see NEC
250.24(A)(4)). Follow all torque specifications for
the terminal bars. A wire type main bonding jumper
is provided to properly bond the service equipment.
NOTE: A wire type main bonding jumper (A) is
provided on 200 A units and 100 A Service
Entrance rated units. This bonding jumper can be
removed if needed where the ATS is not installed
as service equipment.
NOTE: Service entrance rated model will have a
service disconnect in area (B) of Figure 3-3.
3. Connect the inverter protected load ungrounded
feeder conductors to terminals E1 and E2 on the
transfer mechanism.
4. Connect the inverter protected load neutral
conductor to the neutral terminal bar. Connect the
inverter protected load equipment grounding
conductor to the equipment grounding terminal bar.
Follow all torque specifications for the terminal
bars.
5. Connect a subpanel supply to lower T1 and T2
Terminals. Connect subpanel Neutral conductor to
the neutral terminal bar and the equipment
grounding conductor to the equipment ground
Copper or Aluminum conductors shall be sized in
accordance with all applicable NEC requirements,
and shall be permitted to be sized based on the
75°C column of Table 310.16 in the NEC. The
installation must comply fully with all applicable
codes, standards and regulations.
Knockouts into the transfer switch can be made in the
field as needed for entry of power cables and conduit.
Conduit entry shall maintain the proper wire bending
spaces required by Tables 312.6 (A) and (B) in the NEC.
For transfer switches installed in wet locations, power
004397
D
E
B
A
C
J
H
F
G
(000116)
DANGER
Electrocution. Turn utility and emergency
power supplies to OFF before connecting
power source and load lines. Failure to do so
will result in death or serious injury.