6
Wiring Connections (continued)
INSTALL
ATION WIRING - SINGLE PHASE, 3 WIRE
WARNING: For motors of 1-1⁄2 HP and above, use a magnetic starter to avoid damage to the pressure switch. Consult factory for wiring
information.
WARNING: Risk of el
ectric shock. Can shock, burn, or kill.
Ensure the grou
nd control box, all metal plumbing, and motor frame with copper wire are in compliance with local codes. Use a ground
wire at least as large as the wires supplying power to the motor.
Permanently close all unused openings in this and other equipment.
Disconnect power to the control box before working on or around the control box, pipes, cable, pump, or motor.
Copper Cable Length in Ft. (Service to Motor) G-Series Motors: 1 Ph, 2-Wire Cable, 60 Hz. Wire Size
HP
olt
Wire S
ize, AWG
14
12
10
8 6 4 3 2 1 0 00
0.5
230 466 742 1183 1874 2915 4648 5843 7379 9295 11733
0.75
230 353 562 891 1420 2210 3523 4429 5594 7046 8895 11222
1
230 271 430 686 1087 1692 2697 3390 4281 5394 6808 8590
Copper
Cable Length in Ft. (Service to Motor) G-Series Motors: 1 Ph, 3-Wire Cable, 60 Hz. Wire Size
HP
olt
Wire S
ize, AWG
14
12
10
8 6 4 3 2 1 0 00
0.5
230 359 571 912 1444 2246 3581 4502 5685 7162 9040
230 281 447 713
1129 1757 2800 3521 4446 5601 7070 8920
1
230 233 371 592 937 1458 2324 2921 3689 4648 5867 7402
All cable length
s meet NEC for jacketed 60°C copper cable. Based on 3-Wire Induction Run requirements; Capacitor Run requirements may
vary. Local code requirements may vary. For aluminum cable, go up two sizes from the chart (for example, if the chart calls for No. 10 AWG
(6mm
2
) for cop
per, go to No. 8 AWG (10mm
2
) for aluminum; th
e smaller the number, the larger the cable). Use oxidation inhibitors on the
connections.
CONTROL BOX INSTALLATION
To be sure that starting relay will function and that overload will not “nuisance trip”, install a control box vertically with top side up.
Wire the control box as shown in the figures below. A 3-wire pump will not operate without a control box. Operation without a control box
will burn out a 3-wire motor. Installation must include circuit and component protection which meets local code and United States National
Electrical Code requirements.
If the main overload trips, look for:
1. Shorted Capacitor
2. Voltage Problems
3. Overloaded or locked pump
0.75
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