OM−03833
JS AND JSV SERIES PUMPS
FM
APPROVED
PAGE B − 7
INSTALLATION
Field Wiring Connections (Incoming Power)
Do not connect the pump motor directly
to the incoming power lines. The pump
motor is designed to operate through a
Gorman-Rupp approved control box
which provides overload protection and
power control; otherwise, the pump
warranty will be voided. Make certain
that the pump and control box are prop-
erly grounded, and that the incoming
power matches the requirements of the
pump and controls. Install and operate
the control box in accordance with the
National Electric Code and all local
codes. Failure to follow these could re-
sult in injury or death to personnel.
Field wiring is
not
provided with this pump, and
must be supplied by the user. The field wiring must
be of the proper size and type to ensure an ade-
quate voltage supply to the pump. Voltage avail-
able
at the motor
must be within the range indi-
cated in Table B-3.
Table B-3. Pump Voltage Requirements
NOMINAL
VOLTAGE
3
3
230
460
210
420
250
500
PHASE
MINIMUM
VOLTAGE
MAXIMUM
VOLTAGE
3
200
180
220
1
230
220
240
3
575
518
631
Use conduit cable clamps to secure the incoming
field wiring to the control box. Make certain all con-
nections are tight. If necessary, support the cable
weight to prevent excessive strain on cable clamps
and cable.
Refer to the wiring diagrams at the end of this sec-
tion for field wiring connections.
Dual Voltage
This pump was wired at the factory only
for the voltage shown on the nameplate.
Do not attempt to change the voltage on
a dual-voltage motor. If desired to have
the voltage changed, return the pump to
the factory or to an authorized Gorman-
Rupp repair facility only; otherwise, the
pump warranty will be negated, and
damage to the pump, and injury or death
to personnel can result.
Motor Cable Grounding Test
Do not connect the pump control cable
to the control box or incoming voltage
before verifying the pump ground;
otherwise, personnel will be exposed to
serious injury or death.
Using a volt-ohm meter, connect one lead to the
motor cable green/yellow ground lead. Connect
the other lead to an
uninsulated
point on the pump
body. The test circuit should close.
If the test circuit does not close, there is a defect in
the cable or motor which must be corrected.
Conductor Identification
The conductors in the pump cable are labeled
when shipped from the factory. If the conductors
are shortened in the field, resulting in loss of identi-
fication markers, they can still be identified by their
location relative to the ground wire.
Refer to the wiring diagrams at the end of this sec-
tion; as seen from the free end of the cable, the
conductor immediately adjacent to and clockwise
from ground (green/yellow) is assigned number T1
(T4), the next clockwise conductor T2 (T5), etc.
If the conductors are re-labeled, they should be
identified with wire markers from the factory.
