Grundfos SP Series - Control Box Grounding

6.7.6 Control box or panel grounding
DANGER
Electric shock
Death or serious personal injury
‐ The control box or control panel must be permanently
grounded in accordance with the National Electrical
Code/Canadian Electrical Code and local codes or
regulations.
The ground wire must be a bare copper conductor at least the same
size as the submersible drop cable wire size.
Run the ground wire as short a distance as possible and fasten it
securely to a true grounding point.
True grounding points are considered to be one of the following:
• a grounding rod driven into the water strata
• a steel well casing submerged into the water lower than the
pump installation depth
• steel outlet pipes without insulating couplings.
If plastic outlet pipe and well casing are used or if a grounding wire
is required by local codes, connect a properly sized, bare copper
wire to a stud on the motor and run to the control panel.
DANGER
Explosive environment
Death or serious personal injury
‐ Do not ground to a gas supply line. Connect the
grounding wire to the ground point first and then to the
terminal in the control box or control panel.
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TM065266
Wiring and installation diagram
Pos. Description
1 Power supply
2 Electrical disconnect box
3 Control box
4 House supply
5 Conduit connector
6 Submersible drop cable
7 Pressure gauge
8 Pressure switch
9 Pressure tank
10 Well seal
11 Tape
12 Pump
13 Motor
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Conduit
*
*
Conduit for proper support and protection of the cable against damage
between the motor and the point of supply connection.
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English (US)