Flint & Walling Commander Pro 300 - Manual (Page 9)

9
95 North Oak Street • Kendallville, IN 46755
1. Proceed with electrical hook-up matching cable
colors and following the wiring diagrams (Figures
9, 10 &11) or inside the lid of the control box.
WARNING: Connect motor leads momentarily for
correct rotation before installing pump in well.
FUSE SIZES
IL0100
Figure 9 — Single Phase Control Box
Fused Disconnect
Switch
Ground
Pressure
Switch
Ground
L1
L2 R Y B
Control Box
Lightening
Arrestor
To Motor
Ground
Red
Yellow
Black
IL0101
Figure 10 —
Single Phase Control Box with Contactor
SW
L1
L2 R Y B
Lightening
Arrestor
To Motor Pressure Switch
Control Box
Fused Disconnect
Switch
Ground
Ground
Ground
Red
Yellow
Black
IL0102
Figure 11 — Three Phase Magnetic Starter
Fused Disconnect
Switch
Lightening Arrestors
Pressure
Switch
Motor
Ground
L3 L2
2
3
T1 T2
T1
T2
T3
V M
1
L1
X2
W
T3
1. For proper sizing of fuses for fuse disconnect
box, see Motor Data Charts. Improperly sized
fuses will result in fuses blown or circuit breakers
tripped.
GROUNDING
Proper Grounding of Submersible Motors
1. The purpose of grounding any electrical
apparatus is to prevent an electrical shock hazard
if exposed metal becomes connected to an
electrical circuit. This can occur from a defect in
construction of the electrical equipment, physical
damage, or a breakdown in the insulation of the
equipment. Grounding prevents shock hazard by
keeping exposed metal from reaching a voltage
level which could endanger anyone coming in
contact with the electrical equipment. Fault
current is “drained” by the ground conductor, and
if the fault is severe enough, the circuit will be
opened by the fuse or circuit breaker.
2. The U.S. National Electrical Code (NEC) requires
that motor-operated water pumps, including
submersible type regardless of voltage, shall
be grounded. The Canadian Electrical Code
specifically discusses grounding requirements
for submersible pumps. Interpretation of these
and other codes may vary in different states and
localities, but all applicable national, state, and
local codes should always be followed.
3. Any submersible motor which is to be run tested
out of the well should be grounded to prevent
possible shock hazard during the test.
NOTE: Always disconnect all power when making
ohmmeter check and while pulling or installing a
pump.
4. The most logical way to “frame” ground a
submersible motor is normally as follows:
a. Run an extra wire with the motor power
conductors. This wire must be sized to meet
Table 250-95 in the U.S. National Electrical
Code. If code information is unavailable, using
the same size wire as the power conductors is
normally adequate.
b. The ground wire may be insulated or bare.
If insulated, it must be green with or without
yellow stripe(s). The ground wire may be
part of, or separate from the supply cable. It
may be continuous or spliced above the pump
along with the supply cable.
c. Connect the green or bare ground wire to the
green ground wire of the submersible motor
lead assembly. If the lead wire assembly does
not include a separate ground wire, attach a
lug to the ground wire and place the lug over
one of the motor studs above the pump intake
flange so the pump will not be cocked. The