Flint & Walling Constant Pressure Pumping Stations - end suction centrifugal pumps - Manual (Page 4)

4
95 North Oak Street • Kendallville, IN 46755
Copyright 2012. All Rights Reserved.
SINGLE PHASE
Distance From Motor
To Fuse Box Meter,
or Electrical Outlet
Recommended Copper Wire Size
1HP 1-1/2 HP 2 HP 3 HP 5 HP
100 ft.
115V
230V
10
14 8
12
8
10
*
8 -
6
150 ft.
115V
230V
6
12
6
12
4
10
*
8
4
200 ft.
115V
230V
6
12
6
10
4
8 *
6 -
4
300 ft.
115V
230V
*
12
*
6 *
6 *
4 -
2
500 ft.
115V
230V
*
10
*
4 *
4 *
2 -
0
(*) Not economical to run at 115V, use 230V.
Figure 3
THREE PHASE
Distance From
Motor To Fuse
Box Meter, or
Electrical Outlet
Recommended Copper Wire Size
1HP
1-1/2
HP
2 HP 3 HP 5 HP
7-1/2
HP
100 ft.
230V
460V 14
14 12
12 12
12 12
12 10
12 8
12
150 ft.
230V
460V 14
14 12
12 12
12 10
12 8
12
6
12
200 ft.
230V
460V 14
14 12
12 12
12 10
12 8
12
6
12
300 ft.
230V
460V 12
14 12
12 10
12 8
12
6
10
4
10
500 ft.
230V
460V 10
14 10
12 8
12
6
10
4
8 2
8
Figure 4
MOTOR PROTECTION
WARNING: Never examine, make wiring changes
or touch the motor before disconnecting the main
electrical supply switch.
1.
Motors may or may not have built-in thermal
overload protection depending upon the
horsepower size, phase, type and motor
manufacturer. Refer to the motor nameplate for
overload protection information. It is recommended
that a properly sized magnetic or manual starter
(both with properly sized heaters) be used with all
motors. Install starters following instructions of the
starter manufacturer. See Figure 8 & 9 for magnetic
starter wiring diagram. See Figures 5, 6 & 7 for
motor diagrams.
2. All motors (single and three phase) should be
equipped with a correctly fused disconnect switch
to provide protection. Consult Local or National
Electrical Codes for proper fuse protection based on
motor nameplate.
3. Under size wiring can cause motor failure (low
voltage), frequent cut-out of motor overload
protector, television interference and even fire.
Make certain the wiring is adequately sized (Figure
3 & 4), well insulated and connected to a separate
circuit outside the building in case of fire.
IL1229
6 5 4
3 2 1
7 8 9
6 5 4
7 8 9
3 2 1
HIGH VOLTAGE LOW VOLTAGE
LINE LINE
3 Phase
Figure 5 - Wiring Diagram for Baldor TEFC 3 Phase
motors
6 5 4
3 2 1
7 8 9
6 5 4
7 8 9
3 2 1
(4)
(10)
(9)
(3)
(2)
(4)
(10)
(9)
(3)
(2)
IL1230
HIGH VOLTAGE LOW VOLTAGE HIGH VOLTAGE
LOW VOLTAGE
LINE LINE
BROWN
LINE
VIOLET
BLACK
YELLOW
BLUE
BROWN
LINE
VIOLET
BLACK
YELLOW
BLUE
3 Phase 1 Phase
Figure 6 - Wiring Diagram for Franklin Electric TEFC 1 Phase
and 3 Phase motors
IL1231
T6 T5 T4
T3 T2 T1
T7 T8 T9
T6 T5 T4
T7 T8 T9
T3 T2 T1
T2
T5
T8
T6
T3
T7 T1
HIGH VOLTAGE LOW VOLTAGE GROUND
(WHEN REQ)
LINE LINE
3 Phase
Figure 7 - Wiring Diagram for Marathon TEFC 3 Phase
motors