1.10 Wire Sizing Chart—C-Models
Model
Switch
Types
Motor
Part No.
Hp
Phase Voltage
Approximate
Full Load
Amperage
Minimum Wire Size,
AWG Length of Run
in Feet
Heater
Element
Part No.
Wiring Connections
0–100 to 200 to 300
C9
C10
S-10
SM-10
2555
(Obs.)
3/4
1
115
230
10
5
12
12
8
12
6
12
2574
(P28)
115V
2277-X1 or 2277-X2 Switch Assy
(uses switch 2275)
208–230V
2277-X1 or 2277-X2 Switch Assy
(uses switch 2275)
C10
C12
S-20
SM-20
2556
(Obs.)
1
1
115
230
18
9
8
12
6
12
4
10
2610
(P32)
C10
C12
C13
—
3760
(Rep. by
4261)
2
1
115
230
24
12
8
12
4
10
2
8
4250
(P36)
115V
(uses switch 2275)
208–230V
(uses switch 2275)
C10
C12
C13
S-30
SM-30
4261
2
1
115
230
20
10
8
12
4
10
2
8
No
overload
115V
2277-X3 or 2277-X4 Switch Assy
(uses switch 3784)
230V
2277-X3 or 2277-X4 Switch Assy
(uses switch 3784)
C14
—
2557
a
3
3
230
460
10
5
12
12
12
12
12
12
—
208–230V
460V
T3
T1
T1
T2
L2
L1
LINE
LINE
T2
T4
T3
T1
T1
T2
L2
L1
LINE
LINE
T2
T4
T3
T1
T1
T2
L2
L1 LINE
LINE
T2
T4
T3
T1
T1
T2
L2
L1 LINE
LINE
T2
T4
LINE
4
7
1
LINE
5
8
2
LINE
6
9
3
LINE
4
7
1
LINE
5
8
2
LINE
6
9
3
LINE
LINE
L1
L2
T2
T1
T4
T2
T3
T1
LINE
LINE
L1
L2
T2
T1
T4
T2
T3
T1
a
Pump must rotate in the direction shown on pump case. If not, switch any two of the three incoming 3 phase lines.
Notes:
1. Green wire, if present, should be grounded.
2. For Coro-Flo units with oversized motors, follow the wiring information for the appropriate motor and operating voltage.
3. Any differences on the motor nameplate should take precedence over the data presented on this sheet.
4. All electrical work should be done by a qualified electrician familiar with local codes.
7
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