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2: INSTALLATION INFORMATION
2:1 General
The basic AST3225 transfer switch includes all control wiring connections.
The electrical switchgear should be installed by a certified electrician, and all wiring
to/from the unit should agree with all applicable electrical codes, standards, and practices.
An engine controller or timing module (optional) is usually installed at the engine; this
installation can be performed by the electrician, or by a mechanic competent at engine
wiring. A diagram for wiring up a typical engine controller at the engine is included at
Section 5:4, Page 15
Interconnecting the engine controller or timer module controller to the transfer switch is
done simply with a 5-wire signal cable. We provide 50’ as a standard length with each
order, but any length, in 25’ increments can be provided upon request, for a nominal
charge.
The “cable assembly” has the transfer switch connector already mounted. Simply install
it in the Relay Board receptacle, pass the bare end through an appropriately located hole
in the enclosure, and run it to the engine controller or timer module. At the controller,
trim the wire to length, strip the color coded wires, and insert them into the appropriate
locations of the 5-pin connector supplied for the purpose. Then connect to the adaptor
harness. (Also supplied.)
2:2 Recommended Upstream Protection
The AST3225 Transfer Switch Mechanism has been approved for use with the following
upstream protective device:
MANUFACTURER CLASSIFICATION AMPERE
RATING
CATALOG
NUMBER
AMP-TRAP
GOULD SHAWMUT
CLASS J
300
A4J300
RECOMMENDED FUSE BLOCKS WITH BOX CONNECTORS FOR AMP-TRAP
CLASS J FUSES
CATALOG NUMBER
600 VOLTS OR LESS
FUSE
AMPERE
RATING
1 POLE
3 POLE
300 64031J
64033J
Manual for AST3225
Automatic
Transfer Switch
