Gorman-Rupp Pumps S3A1 460V 3P All serial numbers Control Box - Manual (Page 13)

CONTROL BOXES OM−05169
PAGE B − 7 INSTALLATION
Field Wiring Connections (Incoming Power)
The electrical power used to operate
this pump is high enough to cause inju-
ry or death. Obtain the services of a qu-
alified electrician to make all electrical
connections. Make certain that the
pump and enclosure are properly
grounded; never use gas pipe as an
electrical ground. Be sure that the in-
coming power matches the voltage and
phase of the pump and control before
connecting the power source. Do not
run the pump if the voltage is not within
the limits.
The control is designed to regulate the power sup-
ply. The field wiring must be properly sized to en-
sure an adequate voltage supply. The voltage
available at the pump motor must be within the in-
dicated range.
Table 3. Pump Motor Voltage Limits
Nominal
Voltage Minimum
Voltage Maximum
Voltage
Phase
200 1 190 210
115 1 110 120
230 1 220 240
220 (50 Hz) 1 209 230
If the voltage is not within the recommended limits,
obtain the services of a qualified electrician to de-
termine the correct field wiring size and other de-
tails to ensure an adequate voltage supply.
Make certain all connections are tight and that ca-
ble entry points are rainproof. Support the cable
weight, if required, to prevent excessive strain on
cable clamps and cable.
NOTE
After the power cables have been connected to the
control box, make certain the connection is water-
proof.
Power Cable Connections
The electrical power used to operate the
control box is high enough to cause in-
jury or death. Obtain the services of a
qualified electrician to make all electri-
cal connections. Make certain that in-
coming power to the control box is in the
off position and locked out, or that the
power supply to the control box has
been otherwise cut off and locked out,
before connecting power or accessory
cables.
When necessary to change or connect power
cables to the control box, make certain the incom-
ing power is OFF and LOCKED OUT. Make certain
the control box is properly grounded and that the
electrical data on the control matches the pump
motor name plate data.
Connect the power cable to the control box as
shown in the wiring diagrams in this section. Use
conduit or cable clamps to secure the power and
accessory cables to the control box. Make certain
that all connections are tight and that cable entry
points are rainproof.
Control Box Specifications
Overload relays are provided to protect the pump
motor.
If burnout of the overload protection oc-
curs, the complete overload protection
must be replaced.