Siemens Liquid-cooled Generators Installation Manuallines page 13

switch is used, a main service disconnect (D) must be located before the transfer
switch. The transfer switch is installed between the utility service entrance and
the building distribution panel (A).
D ATS A
Total Isolation
The generator will be backing up all
electrical loads within the circuit, so the
amperage rating of the transfer switch
must be equal to, or greater than, the
amperage rating of the normal utility
service.
Unless a service entrance rated transfer
Regardless of configuration, power wiring,
control wiring and wiring for the 15 or 20
Amp circuit required for the 2-Amp battery
charger must always be in separate
conduit.
In all installations, a ground wire will
run through the power conduit from the
generator control panel to the transfer
switch.
In any three-phase application, the phase
rotation of the generator power lines must
match the phase rotation of the utility
power lines at the transfer switch.
While supporting the lugs, use a torque
wrench to tighten the lugs on the
generator circuit breaker and the transfer
switch. Torque specifications are in the
Owner's Manual.
Consult the Technical Manual that
comes with the transfer switch for wiring
diagrams and any product changes,
modifications or updates.
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