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3.6
Motor Wiring
3.6.1
Single-Phase Motors - IMPORTANT!
Single phase three-wire motors require the use of a special controller includ-
ed in a separate enclosure with each motor. The controller enclosure is not
attached to the motor. Operation of motors without the controller or using
the incorrect controller can result in failure of the motor and voids warranty.
The controller is mounted in a NEMA 4X enclosure and suitable for indoor or
outdoor applications within temperatures of 14°F (-10°C) to 122°F (50°C).
The controller should never be mounted in direct sunlight or high-temperature
locations as this will cause shortened capacitor life and unnecessary tripping
of the overload protector.
The controller enclosure is designed for vertical upright mounting only.
Mounting in other positions will affect its operation.
The controller must be electrically wired to the motor using minimum 8 AWG
for 5 horsepower motors and 10 AWG for 3 horsepower motors.
The controller must be supplied with two sources of power. The control circuit
(motor starter coil) must be electrically wired with 110 VAC-50 Hz or 120 VAC-
60 Hz voltage. The power circuit must be electrically wired with single-phase
to match the motor label.
Figure 3.5
Two Sources of Power to
the Single-Phase Controller
10
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