Gorman-Rupp Pumps SF4C 1528832 and up - Manual (Page 11)

SF SERIES OM-06511
PAGE B - 3 INSTALLATION
ity, keep the line as short and straight as possible.
Elbows and fittings used in a discharge line in­
crease friction losses; minimize their use.
It is recommended that a check valve or throttling
valve be installed in the discharge line to control si­
phoning or back flow when the pump is shut off.
ELECTRICAL CONNECTIONS
Install and operate this pump in accor­
dance with the National Electrical Code
and all local codes. Have a qualified
electrician perform all checks and con­
nections in this section.
Never attempt to alter the length of the
pump motor cable or to repair it with a
splice. The power cable and pump mo­
tor must be kept completely waterproof.
Serious damage to the pump and injury
or death to personnel can result from
any alteration to the cable.
Field Wiring Connections (Incoming Power)
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-2.
TABLE B-2. MOTOR VOLTAGE LIMITS
NOMINAL
VOLTAGE
PHASE MINIMUM
VOLTAGE
MAXIMUM
VOLTAGE
3 460 414 506
3 575 517 632
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.
Motor Cable Grounding Test
Do not connect the pump power or con­
trol cables to the control box or incom­
ing voltage before verifying the pump
ground. Otherwise, personnel will be
exposed to serious injury or death.
Connect one lead of a lamp, bell or similar testing
device to the motor cable green/yellow ground
lead (s). Connect the second test lead to an unin­
sulated 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.
Control Box Connections
The pump warranty is void if the motor is
not operated through a control box ap­
proved by Gorman‐Rupp.
This pump is shipped completely wired for the volt­
age shown on the nameplate and is ready for op­
eration through an approved control box.
Ground the control box in accordance with the in­
structions accompanying it.
Ground the pump to the control box using the pow­
er cable ground(s) and ground check wire (if so
equipped). Secure the ground wire(s) and ground
check wire (if so equipped) to the grounding lug(s)
inside the control box to ensure a thorough ground
for the pump.
Ground the pump using the power cable
ground wire(s) before applying line po­
tential. Failure to properly ground the
pump could result in damage to the
pump or control and/or injury or death to
personnel.