Gorman-Rupp Pumps S3B65-E6 460/3 861279 thru 1217130 - Manual (Page 11)

OM−04410 CONTROL BOXES
PAGE B − 4 INSTALLATION
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 (0,19 SQ. M)
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 m) from any other electrode or ground
rod, such as those used for signal circuits, ra-
dio grounds, lightning rods, etc.
The earth surrounding the ground rod or plate
must contain enough moisture to make a
good electrical connection. In dry or sandy ar-
eas, pour water around the rod, or consult
qualified personnel to devise a method of im-
proving the connection.
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 1. Pump Motor Voltage Limits
Nominal
Voltage Minimum
Voltage Maximum
Voltage
Phase
460 3 420 500
575 3 520 630
230 3 210 250
200 1 190 210
115 1 110 120
230 1 220 240
220 (50 Hz) 1 209 230
380 (50 Hz) 3 345 415
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