Master 123340 Owner's Manual page 7

Electrical
WIRING
Ground motor before connecting to electrical
power supply. Failure to ground motor can cause
severe or fatal electrical shock hazard.
Do not ground to a gas supply line.
To avoid dangerous or fatal electrical shock, turn
OFF power to motor before working on electrical
connections.
Supply voltage must be within ±10% of nameplate
voltage. Incorrect voltage can cause fire or dam-
age motor and voids warranty. If in doubt consult a
licensed electrician.
Use wire size specified in Wiring Chart (below).
If possible, connect pump to a separate branch
circuit with no other appliances on it.
Wire motor according to diagram on motor name-
plate. If nameplate diagram differs from diagrams
above, follow nameplate diagram.
Step 1. Install, ground, wire and maintain this pump in
accordance with electrical code requirements.
Consult your local building inspector for informa-
tion about codes.
Step 2. Provide a correctly fused disconnect switch for
protection while working on motor. Consult local or
national electrical codes for switch requirements.
Step 3. Disconnect power before servicing motor or
pump. If the disconnect switch is out of sight of
pump, lock it open and tag it to prevent unexpect-
ed power application.
Wiring Chart – Recommended Wire and Fuse Sizes for 115 and 230 volts
Pump
Model HP Volts
123340 1 115/230
123341 1-1/2 115/230
123342 2 115/230
* Dual element or Fusetron time delay fuses recommended for all motor circuits.
For parts or assistance, call Master Plumber Customer Service at
Branch AWG
Max. Fuse Min.
Load Rating* Wire
Amp Amp Size (mm
14.8/7.4 20/15 12/14 (3/2)
19.2/9.6 25/15 10/14 (5.5/2)
24/12 30/15 10/14 (5.5/2)
Step 4. Ground the pump permanently using a wire of the
same size as that specified in wiring chart, below.
Make ground connection to green grounding ter-
minal under motor canopy marked GRD. or
Step 5. Connect ground wire to a grounded lead in the
service panel or to a metal underground water
pipe or well casing at least 10 feet long. Do not
connect to plastic pipe or insulated fittings.
Step 6. Protect current carrying and grounding conduc-
tors from cuts, grease, heat, oil, and chemicals.
Step 7. Connect current carrying conductors to terminals
L1 and L2 under motor canopy. When replacing
motor, check wiring diagram on motor nameplate
against Figure 4. If the motor wiring diagram does
not match the diagram, follow the diagram on the
motor.
IMPORTANT: 115/230 Volt single phase models are
shipped from factory with motor wired for 230 volts.
If power supply is 115 volts, remove motor canopy and
change switch dial on motor as shown in Figure 4. Do not
try to run motor as received on 115 volt current.
Step 8. Motor has automatic internal thermal overload
protection. If motor has stopped for unknown
reasons, thermal overload may restart it unex-
pectedly, which could cause injury or property
damage. Disconnect power before servicing
motor.
Step 9. If this procedure or the wiring diagrams are
confusing, consult a licensed electrician.
DISTANCE IN FEET(METERS) FROM MOTOR TO SUPPLY
0 - 100 101 - 200
(0 - 30) (31 - 61)
) AWG WIRE SIZE (mm
2
12/14 (3/2) 8/14 (8.4/2)
10/14 (5.5/2) 8/14 (8.4/2)
10/14 (5.5/2) 6/14 (14/2)
201 - 300 301 - 400
(62 - 91) (92 - 122)
)
2
6/14 (14/2) 6/12 (14/3)
6/12 (14/3) 4/10 (21/5.5)
6/12 (14/3) 4/10 (21/5.5)
1-800-628-9439
7
.
401 - 500
(123 - 152)
4/10 (21/5.5)
4/10 (21/5.5)
4/10 (21/5.5)