Electrical – Sears 390.2508 User Manual
Page 6
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ELECTRICAL
WIRING CONNECTIONS
A WARNING I pij-e 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.
Motor wires
connect here.
-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 (biack or red)
to one of these screws (It'doesn't rnatter
which one). Connect the white (neutrai) wire
to the other screw. Cap any remaining
black or red wires.
Ciamp the power cabie to prevent strain
on the terminai screws.
■ Connect the green (or bare copper) ground wire
to the green ground screw.
3187 039B
Connection Procedure:
1. Connect the ground wire first as shown in Figure 6. 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 6.
5. Reinstall the pressure switch cover.
Figure 6 - Pressure switch wiring
TABLE II: WIRING CHART — Recommended Fusing and Wiring Data
Distance in Feet From Motor to Meter
Branch*
0’
51’
101’
201’
201’
401’
Motor
Max.
Fuse
to
to
to
to
to
to
Horse-
Load
Rating
50’
100’
200’
300’
400’
500’
power
Volts
Amperes
Amps
Wire Size
1/2
115/230
10.4/5.2
15/15
14/14
14/14
10/14
8/14
6/14
6/12
■ Time delayed fuses are recommended Instead of regular fuses in any motor circuit.