8
(2) 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 (65.62feet).
200V class (when input power supply is 220V)
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
Ground
cable
R/L1, S/L2,
T/L3
U, V, W
R/L1,
S/L2,
T/L3
U, V, W
Ground
cable
FR-F720-00046 to
00105-NA
M4
1.5
2-4
2-4
2
2
2
14
14
2.5
2.5
2.5
FR-F720-00167-NA
M4
1.5
5.5-4
5.5-4
3.5
3.5
3.5
12
12
4
4
4
FR-F720-00250-NA
M4
1.5
5.5-4
5.5-4
5.5
5.5
5.5
10
10
6
6
6
FR-F720-00340-NA
M5
2.5
14-5
8-5
14
8
5.5
6
8
16
10
16
FR-F720-00490-NA
M5
2.5
14-5
14-5
14
14
14
6
6
16
16
16
FR-F720-00630-NA
M5
2.5
22-5
22-5
22
22
14
4
6 (
*5
)
25
25
16
FR-F720-00770-NA
M6
4.4
38-6
38-6
38
38
22
2
2
50
50
25
FR-F720-00930-NA
M8(M6)
7.8
38-8
38-8
38
38
22
2
2
50
50
25
FR-F720-01250-NA
M8(M6)
7.8
60-8
60-8
60
60
22
1/0
1/0
50
50
25
FR-F720-01540-NA
M8(M6)
7.8
80-8
80-8
80
80
22
3/0
3/0
70
70
35
FR-F720-01870-NA M10(M8)
14.7
100-10 100-10
100
100
38
4/0
4/0
95
95
50
FR-F720-02330-NA M10(M8)
14.7
100-10 100-10
100
100
38
4/0
4/0
95
95
50
FR-F720-03160-NA M12(M10)
24.5
150-12 150-12
125
125
38
250
250
⎯
⎯
⎯
FR-F720-03800-NA M12(M10)
24.5
150-12 150-12
150
150
38
2
×
4/0
2
×
4/0
⎯
⎯
⎯
FR-F720-04750-NA M12(M10)
24.5
100-12 100-12 2
×
100 2
×
100
38
2
×
4/0
2
×
4/0
⎯
⎯
⎯
*1
The recommended cable size is that of the cable (e.g. HIV cable (600V class 2 vinyl-insulated cable)) with continuous maximum permissible
temperature of 75°C (167°F). Assumes that the ambient temperature is 50°C (122°F) or less and the wiring distance is 20m (65.62feet) or less.
*2
The recommended cable size is that of the cable (THHW cable) with continuous maximum permissible temperature of 75°C (167°F). Assumes
that the ambient temperature is 40°C (104°F) or less and the wiring distance is 20m (65.62feet) or less.
(Selection example for use mainly in the United States.)
*3
For the FR-F720-00930 or less, the recommended cable size is that of the cable (PVC cable) with continuous maximum permissible temperature
of 70°C (158°F). Assumes that the ambient temperature is 40°C (104°F) or less and the wiring distance is 20m(65.62feet) or less.
For the FR-F720-01250 or more, the recommended cable size is that of the cable (XLPE cable) with continuous maximum permissible
temperature of 90°C (194°F). Assumes that the ambient temperature is 40°C (104°F) or less and wiring is performed in an enclosure.
(Selection example for use mainly in Europe.)
*4
The terminal screw size indicates the terminal size for R/L1, S/L2, T/L3, U, V, W, and a screw for grounding.
A screw for earthing (grounding) of the FR-F720-00930 or more is indicated in ( ).
*5
When connecting the option unit to P/+, P1, N/-, use THHN cables for the option and terminals R/L1, S/L2, T/L3, U, V, W.
