ELECTRICAL
Hazardous voltage. Can shock, burn, or
kill. Connect ground wire before connecting power
supply wires. Use the wire size (including the ground
wire) specified in the wiring chart.
If possible, connect
the pump to a separate branch circuit with no other appli-
ances on it.
Explosion hazard. Do not ground to a gas
supply line.
WIRING CONNECTIONS
Fire hazard.
Incorrect voltage can cause a
fire or seriously damage the motor and voids the warranty.
The supply voltage must be within ±10% of the motor name-
plate voltage.
NOTICE:
Dual-voltage motors are factory wired for 230
volts. If necessary, reconnect the motor for 115 volts, as
shown. Do not alter the wiring in single voltage motors.
Install, ground, wire, and maintain your pump in compli-
ance with the National Electrical Code (NEC) or the
Canadian Electrical Code (CEC), as applicable, and with all
local codes and ordinances that apply. Consult your local
building inspector for code information.
Connection Procedure:
1. Connect the ground wire first as shown in Figure 4. The
ground wire must be a solid copper wire at least as large
as the power supply wires.
2. There must be a solid metal connection between the pres-
sure switch and the motor for motor grounding protec-
tion. If the pressure switch is not connected to the motor,
connect the green ground screw in the switch to the
green ground screw under the motor end cover. Use a
solid copper wire at least as large as the power supply
wires.
3. Connect the ground wire to a grounded lead in a service
panel, to a metal underground water pipe, to a metal well
casing at least ten feet (3M) long, or to a ground electrode
provided by the power company or the hydro authority.
4. Connect the power supply wires to the pressure switch
as shown in Figure 4.
5
FIGURE 4: Motor wiring connections through Pressure Switch. Match motor voltage to line voltage.
Your Motor Terminal Board (under the motor end cover)
and Pressure Switch look like one of those shown below.
Convert to 115 Volts as shown. Do not change motor wiring
if line voltage is 230 Volts or if you have a single voltage
motor. Connect power supply as shown for your type of
switch and your supply voltage.
Move plug to change voltage.
115 V
230 V
Power Supply Wires
L
1
L
2
23
0
115
L
1
L
2
23
0
115
L
1
L
2
23
0
115
Grounding Point
3781 1000
230 Volt to 115 Volt Conversion, Plug-in Type:
230 Volt to 115 Volt Conversion, Plug-in Type:
Pull plug
straight
out from
terminal
board.
1.
1.
2.
2.
Plug in again
with arrow
on plug
pointing to
'115 Volts'.
A
L1
2
3
0
V
o
lt
s
1
1
5
V
o
lt
s
A
L1
2
3
0
V
o
lt
s
1
1
5
V
o
lt
s
Ground
Screw
Clamp the power cable to prevent strain
on the terminal screws.
Connect the green (or bare copper) ground wire
to the green ground screw.
Motor wires connect here.
Clamp the power cable to prevent strain
on the terminal screws.
Connect the green (or bare copper) ground wire
to the green ground screw.
Motor wires connect here.
3187 0398
Power supply wires connect here.
230 Volt: Connect 2 hot wires (black and red)
here and cap the white (neutral) wire. It does
not matter which wire goes to which screw.
115 Volt: Connect one hot wire (black or red)
to one of these screws (it doesn't matter
which one). Connect the white (neutral) wire
to the other screw. Cap any remaining
black or red wires.
Power supply wires connect here.
230 Volt: Connect 2 hot wires (black and red)
here and cap the white (neutral) wire. It does
not matter which wire goes to which screw.
115 Volt: Connect one hot wire (black or red)
to one of these screws (it doesn't matter
which one). Connect the white (neutral) wire
to the other screw. Cap any remaining
black or red wires.
Disconnect power before working on pump, motor, pressure switch, or wiring.
