Gorman-Rupp Pumps S3B65-E6 460/3 861279 thru 1217130 - Manual (Page 20)

OM−04151 S SERIES PUMPS
PAGE B − 14 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 (1858,1 SQ. CM)
SURFACE AREA
(MINIMUM)
a) PLATE ELECTRODE b) DRIVEN ELECTRODE c) BURIED ELECTRODE
Figure B−3. 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.
The earth surrounding the ground rod or plate
must contain enough moisture to make a
good electrical connection. In dry or sandy
areas, pour water around the rod, or consult
qualified personnel to devise a method of im-
proving the connections.
The electrical power used to operate
this pump is high enough to cause inju-
ry or death. Make certain that the control
box is properly grounded after installa-
tion.
Refer to the literature accompanying the control
box for field wiring connections.
Pump Power Cable Connections
The electrical power used to operate
this pump is high enough to cause inju-
ry 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.
The pump is provided with a 50 ft. (15,2 m) power
cable (see Table B−4 for standard power cable
specifications). If a longer cable is required, an op-
tional cable assembly must be ordered from the
factory. Splicing of the power cable is not recom-
mended by the Gorman-Rupp Company due to
safety and warranty considerations.
Never attempt to alter the length or re-
pair any power cable with a splice. The
pump motor and cable must be com-
pletely waterproof. Injury or death may
result from alternations.