Gorman-Rupp Pumps SE2C3 115V 1P 1483930 and up User Manual
Page 11
SE SERIES
OM−06492
PAGE B − 4
INSTALLATION
or death to personnel can result from
any alteration to the cable.
Field Wiring Connections (Incoming Power)
The pump is designed to operate with a 115 volt,
1 phase, 60 hertz power supply. The voltage avail-
able at the motor must be within the range indi-
cated in Table B-3.
To calculate the voltage available at the motor, pro-
ceed as follows:
a. Measure the voltage while the pump is oper-
ating at full capacity. See wiring diagrams at
the end of this section.
b. Next, subtract the motor cable voltage drop
(see Table B-5, Pump Power Cable Specifi-
cations).
c. Do not continue to operate the pump if this
voltage is not within the recommended limits.
Obtain the services of a qualified electrician to
determine the correct field wiring size and oth-
er details to ensure an adequate voltage sup-
ply to the pump.
Table B-3. Pump Voltage Requirements
NOMINAL
VOLTAGE
PHASE
MINIMUM
VOLTAGE
MAXIMUM
VOLTAGE
1
115
110
120
Grounding Methods
If the power cable will be wired into an optional
manual switch or control box, ground the enclo-
sure before installing the wiring. In any of these
cases, the electrical circuit must be grounded to a
properly imbedded electrode.
The material used for the electrode must be an ex-
cellent conductor of electricity, such as copper. If
iron or steel is used, it must be galvanized or other-
wise metal plated to resist corrosion. Do not coat
the electrode with any material of poor conductiv-
ity, such as paint or plastic.
The electrode must conform to the recommenda-
tions of N.E.C. ARTICLE 250. Follow all installation
requirements of the N.E.C., and all applicable local
codes. See Figure B-2 for some suggested
grounding methods.
ROCK
8 FEET
(2,4 M)
3/4 INCH (19,1
MM) NOMINAL
DIAMETER
(MINIMUM)
3/4 INCH (19,1 MM)
NOMINAL DIAMETER
(MINIMUM) 8 FEET
(2,4 M) LONG
SOIL
SOIL
SOIL
1/4 INCH (6,4 MM)
STEEL PLATE 2 SQ.
FEET (1858,1 SQ. CM)
SURFACE AREA
(MINIMUM)
a) PLATE ELECTRODE
b) DRIVEN ELECTRODE
c) BURIED ELECTRODE
Figure B-2. Suggested Grounding Methods
a. Plate Electrode: An iron or steel plate, 1/4
inch (6,4 mm) thick, completely impeded in
the ground. The plate must present a surface
area of at least 2 square feet (1858,1 sq. cm.).
b. Driven Electrode: A rod or pipe, 3/4 inch
(19,1 mm) in diameter minimum, 8 feet (2,4 m)
long, completely driven into the ground.
c. Buried electrode: If rock or stone prevents
embedding the full 8 foot (2,4 m) length of the
ground rod, bury it horizontally in a trench.
Space the ground rod or plates at least 6 feet
(1,8) from any other electrode or ground rod,
such as those used for signal circuits, radio
grounds, lightning rods, etc.