Gorman-Rupp Pumps SM4G1-X30 460/3 1002211 thru 1241783 - Manual (Page 18)

OM−04417 SM SERIES
PAGE B − 13 INSTALLATION
ROCK
8 FEET
(2,4 M)
3/4 INCH (19,1
MM) NOMINAL
DIAMETER
(MINIMUM)
SOIL SOIL SOIL
1/4 INCH STEEL
PLATE 2 SQ. FEET
(1858,1 SQ. CM)
SURFACE AREA
(MINIMUM)
a) PLATE ELECTRODE b) DRIVEN ELECTRODE c) BURIED ELECTRODE
3/4 INCH (19,1 MM)
NOMINAL DIAMETER
(MINIMUM) 8 FEET
(2,4 M) LONG
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.
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 qu-
alified electrician to make all electrical
connections. Make certain that incom-
ing power to the control box is in the off
position and locked out, or that the pow-
er supply to the control box has been
otherwise cut off and locked out, before
connecting power or accessory cables.
The standard pump is provided with a 50 foot
power cable (see Table B-5 for cable specifica-
tions). If a longer cable is required, an optional ca-
ble assembly must be ordered from the factory.
Splicing of the power cable is not recommended
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 alterations.