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Main circuit terminal specifications
2
2.2.3
Cables and wiring length
(1) Applied cable size
Select the recommended cable size to ensure that a voltage drop will be 2% max.
If the wiring distance is long between the inverter and motor, a main circuit cable voltage drop will cause the motor
torque to decrease especially at the output of a low frequency.
The following table indicates a selection example for the wiring length of 20m.
200V class (when input power supply is 220V)
400V class (when input power supply is 440V)
Applicable Inverter 
Model
Terminal 
Screw 
Size 
*4
Tightening 
Torque 
N·m
Crimping 
Terminal
Cable Sizes
HIV, etc. (mm
2
) 
*1
AWG/MCM 
*2
PVC, etc. (mm
2
) 
*3
R/L1, 
S/L2, 
T/L3
U, V, W
R/L1, 
S/L2, 
T/L3
U, V, W P/+, P1
Earthing 
(grounding)
cable
R/L1, 
S/L2, 
T/L3
U, V, W
R/L1, 
S/L2, 
T/L3
U, V, W
Earthing 
(grounding)
cable
FR-A720-0.4K to 
2.2K
M4
1.5
2-4
2-4
2
2
2
2
14
14
2.5
2.5
2.5
FR-A720-3.7K
M4
1.5
5.5-4
5.5-4
3.5
3.5
3.5
3.5
12
12
4
4
4
FR-A720-5.5K
M5(M4)
2.5
5.5-5
5.5-5
5.5
5.5
5.5
5.5
10
10
6
6
6
FR-A720-7.5K
M5(M4)
2.5
14-5
8-5
14
8
14
5.5
6
8
16
10
16
FR-A720-11K
M5
2.5
14-5
14-5
14
14
14
14
6
6
16
16
16
FR-A720-15K
M6
4.4
22-6
22-6
22
22
22
14
4
4
25
25
16
FR-A720-18.5K
M8(M6)
7.8
38-8
38-8
38
38
38
22
2
2
35
35
25
FR-A720-22K
M8(M6)
7.8
38-8
38-8
38
38
38
22
2
2
35
35
25
FR-A720-30K
M8(M6)
7.8
60-8
60-8
60
60
60
22
1/0
1/0
50
50
25
FR-A720-37K
M10(M8)
14.7
80-10 80-10
80
80
80
22
3/0
3/0
70
70
35
FR-A720-45K
M10(M8)
14.7
100-10 100-10
100
100
100
38
4/0
4/0
95
95
50
FR-A720-55K
M12(M8)
24.5
100-12 100-12
100
100
100
38
4/0
4/0
95
95
50
FR-A720-75K
M12(M10)
24.5
150-12 150-12
125
125
125
38
250
250
⎯
⎯
⎯
FR-A720-90K
M12(M10)
24.5
150-12 150-12
150
150
150
38
300
300
⎯
⎯
⎯
Applicable Inverter 
Model
Terminal 
Screw 
Size 
*4
Tightening 
Torque 
N·m
Crimping 
Terminal
Cable Sizes
HIV, etc. (mm
2
) 
*1
AWG/MCM 
*2
PVC, etc. (mm
2
) 
*3
R/L1, 
S/L2, 
T/L3
U, V, W
R/L1, 
S/L2, 
T/L3
U, V, W P/+, P1
Earthing 
(grounding)
cable
R/L1, 
S/L2, 
T/L3
U, V, W
R/L1, 
S/L2, 
T/L3
U, V, W
Earthing 
(grounding)
cable
FR-A740-0.4K to 
3.7K
M4
1.5
2-4
2-4
2
2
2
2
14
14
2.5
2.5
2.5
FR-A740-5.5K
M4
1.5
2-4
2-4
2
2
3.5
3.5
12
14
2.5
2.5
4
FR-A740-7.5K
M4
1.5
5.5-4
5.5-4
3.5
3.5
3.5
3.5
12
12
4
4
4
FR-A740-11K
M5
2.5
5.5-5
5.5-5
5.5
5.5
5.5
8
10
10
6
6
10
FR-A740-15K
M5
2.5
8-5
8-5
8
8
8
8
8
8
10
10
10
FR-A740-18.5K
M6
4.4
14-6
8-6
14
8
14
14
6
8
16
10
16
FR-A740-22K
M6
4.4
14-6
14-6
14
14
22
14
6
6
16
16
16
FR-A740-30K
M6
4.4
22-6
22-6
22
22
22
14
4
4
25
25
16
FR-A740-37K
M8
7.8
22-8
22-8
22
22
22
14
4
4
25
25
16
FR-A740-45K
M8
7.8
38-8
38-8
38
38
38
22
1
2
50
50
25
FR-A740-55K
M8(M10)
7.8
60-8
60-8
60
60
60
22
1/0
1/0
50
50
25
FR-A740-75K
M10
14.7
60-10 60-10
60
60
60
38
1/0
1/0
50
50
25
FR-A740-90K
M10
14.7
60-10 60-10
60
60
80
38
3/0
3/0
50
50
25
FR-A740-110K
M10(M12)
14.7
80-10 80-10
80
80
80
38
3/0
3/0
70
70
35
FR-A740-132K
M10(M12)
14.7
100-10 100-10
100
100
100
38
4/0
4/0
95
95
50
FR-A740-160K
M12(M10)
24.5
150-12 150-12
125
150
150
38
250
250
120
120
70
FR-A740-185K
M12(M10)
24.5
150-12 150-12
150
150
150
38
300
300
150
150
95
FR-A740-220K
M12(M10)
46
100-12 100-12 2
×100
2
×100 2×100
60
2
×4/0 2×4/0 2×95
2
×95
95
FR-A740-250K
M12(M10)
46
100-12 100-12 2
×100
2
×100 2×125
60
2
×4/0 2×4/0 2×95
2
×95
95
FR-A740-280K
M12(M10)
46
150-12 150-12 2
×125
2
×125 2×125
60
2
×250 2×250 2×120 2×120
120
FR-A740-315K
M12(M10)
46
150-12 150-12 2
×150
2
×150 2×150
100
2
×300 2×300 2×150 2×150
150
FR-A740-355K
M12(M10)
46
C2-200 C2-200 2
×200
2
×200 2×200
100
2
×350 2×350 2×185 2×185 2×95
FR-A740-400K
M12(M10)
46
C2-200 C2-200 2
×200
2
×200 2×200
100
2
×400 2×400 2×185 2×185 2×95
FR-A740-450K
M12(M10)
46
C2-250 C2-250 2
×250
2
×250 2×250
100
2
×500 2×500 2×240 2×240 2×120
FR-A740-500K
M12(M10)
46
C2-200 C2-250 3
×200
2
×250 3×200 2×100 2×500 2×500 2×240 2×240 2×120