S&C Instruction Sheet 719-500 11
Installation
Making Conduit Connections and Connecting
External Control-Circuit Wiring
NOTICE
To avoid accidental energizing of the operator after the
external connections have been completed, remove
the two-pole pull-out fuseholders for the motor, space-
heater, and (if applicable) shunt-trip circuits� See Figure 3
on page 9� Reinsert the fuseholders only when indicated
in the steps which follow�
STEP 1�
Mark the conduit-entrance location for the
control circuit wiring on the conduit-entrance
plate in the bottom of the switch operator enclo-
sure. See Figure 3 on page 9.
STEP 2�
Remove the conduit-entrance plate and cut out
the necessary opening. (If the circuit-switcher is
equipped with optional S&C Shunt-Trip Device,
an entrance cutout for an additional one-inch
conduit should also be made at this time.)
STEP 3�
Replace the conduit-entrance plate and assemble
the entrance fittings. Apply sealing compound
(provided with each switch operator) when
replacing the conduit entrance plate. Verify the
entrance fittings are properly sealed to prevent
water ingress.
STEP 4�
If the circuit-switcher is equipped with the
optional shunt-trip device, install the one-inch-
diameter conduit between adjacent shunt-trip
solenoid housings and between one solenoid
housing and the switch operator. Refer to S&C
Instruction Sheet 711-600.
STEP 5�
Remove the blocking labels (G-3684) from the
motor contactors. Connect the external control-
circuit wiring (including space-heater source
leads) to the terminal blocks of the switch
operator in accordance with the wiring diagram
furnished.
NOTICE
Observe recommended minimum wire size requirements
for the control-circuit wiring and the shunt-trip device
wiring where applicable, as shown in S&C Data Bulletin
719-60 and on the switch operator schematic wiring
diagram furnished�
