Generac Power Systems rtg10eza1, Owner'S Manual

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General Information
Automatic Transfer Switch Owner’s Manual 3
Section 2 General Information
2.1 — Unpacking
Carefully unpack the transfer switch. Inspect closely for
any damage that might have occurred during shipment.
The purchaser must file with the carrier any claims for
loss or damage incurred while in transit.
Check that all packing material is completely removed
from the switch prior to installation.
The pre-wired switch includes:
• 30 foot, five foot, and two foot pre-wired conduits
for making all required wiring runs.
• An outdoor junction box for making connections
between outdoor and indoor pre-wired conduits.
• UL listed wire nuts for reconnecting standby cir-
cuits within the main distribution panel.
The pre-wired limited circuit automatic transfer switch
can be installed along with an 8, 11, 16, kW Air-cooled
Standby Generator, or can be used to pre-wire a home or
small business in advance of generator installation. In
either case, the provided wiring saves installation time
and cost, since the majority of labor involved in installing
a standby power system is in wiring the generator, auto-
matic transfer switch and standby circuit subpanel.
2.2 — Equipment Description
The automatic transfer switch is used for transferring
electrical load from a UTILITY (NORMAL) power source
to a GENERATOR (STANDBY) power source. Such a
transfer of electrical loads occurs automatically when the
UTILITY power source has failed or is substantially
reduced and the GENERATOR source voltage and fre-
quency have reached an acceptable level. The transfer
switch prevents electrical feedback between two different
power sources (such as the UTILITY and GENERATOR
sources) and, for that reason, codes require it in all
standby electric system installations.
The transfer switch consists of a transfer mechanism, a
control relay, fuses, terminal strip, and fuse holder for
connection of sensing wires.
The transfer switch is listed for use on optional standby
systems only (NEC 702).
2.2.1— Transfer Switch Mechanism
These switches (
Figure 2-1
) are used with a single-phase
system, when the single-phase NEUTRAL line is to be
connected to a neutral lug and is not to be switched.
Solderless, screw-type terminal lugs are standard.
The conductor size range is as follows:
This transfer switch is suitable for control of motors, elec-
tric discharge lamps, tungsten filament and electric heat-
ing equipment where the sum of motor full load ampere
ratings and the ampere ratings of other loads do not
exceed the ampere rating of the switch and the tungsten
load does not exceed 30 percent of the switch rating.
This transfer switch is suitable for use on a circuit capa-
ble of 10,000 (100A) symmetrical amperes, 240 VAC
maximum.
Figure 2-1. Typical Single-Phase ATS
Transfer Mechanism
Switch
Rating
Wire Range
Conductor
Tightening
Torque
Lug
Temp.
Rating
50A
#14-1/0 AWG
(Cu/Al)
50 in-lbs
(5.6 Nm)
167°F (75°C)
100A
A Utility Closing Coil
B Generator Closing Coil
C Utility Lugs (N1 & N2)
D Generator Lugs (E1 & E2)
E Load Lugs (T1 & T2)
C
D
E
A
B