ELECTRICAL
Disconnect power at service panel before
connecting pressure switch.
Figure 8 – 115/230 volt motor wiring connections
through typical pressure switch.
Dual voltage motors come factory wired for 230
volt operation. Inset shows 115 Volt conversion.
Do not alter wiring in single voltage motors.
Match motor voltage to power supply voltage.
Risk of serious or fatal elec-
trical shock.
Connect motor ground wire
before connecting power
supply wires.
Do not ground to a gas sup-
ply line.
Turn off power before work-
ing on pump or motor.
Match motor voltage and
power supply voltage.
Supply
voltage must be within ±10% of motor nameplate voltage.
Incorrect voltage can cause fire or seriously damage motor
and voids warranty. If in doubt, consult a licensed electri-
cian.
Use wire size specified in wiring chart.
If possible, con-
nect pump to a separate branch circuit with no other appli-
ances on it.
1. Install, ground, wire and maintain pump in accordance
with your local electrical code and all other codes/ordi-
nances that apply. Consult your local building inspector
for code information.
2. Connect ground wire first as shown at left. Ground wire
must be a solid copper wire at least as large as power sup-
ply wires.
•
There must be a solid metal connection between pres-
sure switch and motor to provide motor grounding
protection. If pressure switch is not connected to the
motor, connect ground screw in switch to motor
ground screw. Use a solid copper wire at least as large
as power supply wires.
•
Connect ground wire to grounded lead in service
panel, metal underground water pipe, well casing at
least 10’ (3M) long, or to ground electrode provided
by power company.
3. Connect power supply wires as shown at left.
4. Replace pressure switch cover before turning on power
to pump.
9
Distance in Feet From
Branch*
Motor to Meter
Delayed
0
51
101
201
Motor
Max.
Fuse
to
to
to
to
Pump
Horse-
Load
Rating
50
100
200
300
Model
power
Volts
Amperes
Amps
Wire Size
115
9.4
15.0
14
14
10
10
390.251181
1/2
230
4.7
15.0
14
14
14
14
115
12.2
15.0
12
12
10
8
390.251981
3/4
230
6.1
15.0
14
14
14
14
115
14.8
20.0
12
12
8
6
390.252281
1
230
7.4
15.0
14
14
14
14
Recommended Fusing and Wiring Data
* Time delayed fuses are recommended instead of fuses in any motor circuit.
A
B
L2
L1
A
B
L2
L1
To convert from
230 to 115 Volts:
Move white wire
w/black tracer
from B to A.
Move black wire
from A to L1.
A
B
L2
L1
A
B
L2
L1
Clamp
power
cable to
prevent
strain on
terminal
screws.
White w/
Black Tracer
Black
Motor Ground
Screw
Connect green (or bare copper) ground
wire to green ground screw.
Motor wires
are connected
to these two
brass screws.
2263 0196
Connect black and white power supply
wires to these two screws, one wire
to each screw. It doesn't matter which
wire goes to which screw.
Your pressure switch may look like this.
If so, connect the black and white power
supply wires to the
outside terminals.
Motor wires are connected to the two
center terminals.
Connect green (or bare copper) ground
wire to green ground screw.
