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Connecting Start Circuit Wires
See
Figure
3-3. Control system interconnections consist
of N1, N2, and T1, and leads 23, 0, and 194. The genera-
tor control wiring is a Class 1 signaling circuit. Reference
instruction manual of specific engine generator for wiring
connection details. Screw heads are straight bladed and
cross-bladed, and should be tightened to 3.5 in-lb (0.4
Nm).
Recommended wire gauge sizes depend on wire length
as specified in the following chart: Consult factory if you
are operating more than one transfer switch and SACM.
Recommended
Wire Size
No. 18 AWG
No. 16 AWG
No. 14 AWG
No. 12 AWG
Exception: Conductors of AC and DC circuits, rated
1000 volts nominal, or less, shall be permitted to occupy
the same equipment, cable, or conduit. All conductors
shall have an insulation rating equal to at least the maxi-
mum circuit voltage applied to any conductor within the
equipment, cable, or conduit. See NEC 300.3(C)(1).
Automatic Transfer Switch Owner's Manual
Maximum Wire Length
(One transfer switch
and load shed module)
1–115 ft (0.3–35 m)
116–185 ft (36–56 m)
186–295 ft (57–89 m)
296–460 ft (90–140 m)
Connecting SACM
See
Figure
3-3. The SACM can control an air conditioner
(24 VAC) directly.
Control of Air Conditioner Load
1. Route the thermostat cable (from the furnace/ther-
mostat to the outdoor air conditioner unit) to the
transfer switch.
2. Connect the wire to the terminal strip terminals
(A/C 1) on the SACM as shown in
These are normally closed contacts which open
upon load shed conditions. Route thermostat wire
away from high voltage wires.
3. If required, connect additional air conditioners to
the terminal strip terminals (A/C 2-4).
Contact Ratings
A/C 1-4
NOTE: These instructions are for a typical air conditioner
installation. Control of certain heat pumps and 2-stage air
conditioners may require special connections or the use
of SMMs to control the loads.
Installation
Figure
3-3.
24 VAC, 1.0 Amp max
11
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