15
WIRING
2.3 Wiring fundamentals
2.3.1 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 a low speed.
The following tables indicate a selection example for the wiring length of 20 m.
200 V class, FR-A820 (220 V input power supply, ND rating, without a power factor improving AC or DC reactor)
200 V class, FR-A820 (220V input power supply, ND rating, with a power factor improving AC or DC reactor)
For footnotes *1 to *4 refer to
Applicable
inverter type
FR-A820-
m
-
R2R
Terminal
screw size
*4
Tightening
torque
[Nm]
Crimp terminal
Cable gauge
HIV, etc. [mm²]
*1
AWG/MCM
*2
PVC, etc. [mm²]
*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
00046(0.4K) to
00167(2.2K)
M4
1.5
2-4
2-4
2
2
2
2
14
14
2.5
2.5
2.5
00250(3.7K)
M4
1.5
5.5-4
5.5-4
3.5
3.5
3.5
3.5
12
12
4
4
4
00340(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
00490(7.5K)
M5 (M4)
2.5
14-5
8-5
14
8
14
5.5
6
8
16
10
16
00630(11K)
M5
2.5
14-5
14-5
14
14
14
8
6
6
16
16
16
00770(15K)
M6
4.4
22-6
22-6
22
22
22
14
4
4
25
25
16
00930(18.5K)
M8 (M6)
7.8
38-8
22-8
38
22
38
14
2
4
35
25
25
01250(22K)
M8 (M6)
7.8
38-8
38-8
38
38
38
22
2
2
35
35
25
01540(30K)
M8 (M6)
7.8
60-8
60-8
60
60
60
22
1/0
1/0
50
50
25
01870(37K)
M10 (M8)
14.7
80-10 60-10
80
60
80
22
3/0
1/0
70
70
35
02330(45K)
M10 (M8)
14.7
100-10 100-10
100
100
100
38
4/0
4/0
95
95
50
03160(55K)
M12 (M8)
24.5
100-12 100-12
100
100
100
38
4/0
4/0
95
95
50
Applicable
inverter type
FR-A820-
m
-
R2R
Terminal
screw size
*4
Tightening
torque
[Nm]
Crimp terminal
Cable gauge
HIV, etc. [mm²]
*1
AWG/MCM
*2
PVC, etc. [mm²]
*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
00046(0.4K) to
00167(2.2K)
M4
1.5
2-4
2-4
2
2
2
2
14
14
2.5
2.5
2.5
00250(3.7K)
M4
1.5
5.5-4
5.5-4
3.5
3.5
3.5
3.5
12
12
4
4
4
00340(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
00490(7.5K)
M5 (M4)
2.5
14-5
8-5
14
8
14
5.5
8
8
10
10
10
00630(11K)
M5
2.5
14-5
14-5
14
14
14
8
6
6
16
16
16
00770(15K)
M6
4.4
22-6
22-6
22
22
22
14
4
4
25
25
16
00930(18.5K)
M8 (M6)
7.8
22-8
22-8
22
22
38
14
4
4
35
25
16
01250(22K)
M8 (M6)
7.8
38-8
38-8
38
38
38
22
2
2
35
35
25
01540(30K)
M8 (M6)
7.8
60-8
60-8
60
60
60
22
1/0
1/0
50
50
25
01870(37K)
M10 (M8)
14.7
60-10 60-10
60
60
80
22
1/0
1/0
70
70
35
02330(45K)
M10 (M8)
14.7
100-10 100-10
100
100
100
38
4/0
4/0
95
95
50
03160(55K)
M12 (M8)
24.5
100-12 100-12
100
100
125
38
4/0
4/0
95
95
50
03800(75K)
M12 (M8)
24.5
150-12 150-12
125
125
150
38
250
250
120
120
—
04750(90K)
M12 (M8)
24.5
150-12 150-12
150
150
2x100
60
300
300
150
150
—
