7
WIRING
3.2 Wiring fundamentals
3.2.1 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 the output of a low frequency.
The following table indicates a selection example for the wiring length of 20m.
400V class (when input power supply is 440V based on the rated current for 110% overload for 1 minute)
Applicable Inverter Type
Terminal Screw Size
*
4
Tightening Torque
[N·m]
Crimping Terminal
R/L1, S/L2, T/L3
U, V, W
FR-F740/746-00023–00083-EC
M4
1.5
2-4
2-4
FR-F740/746-00126-EC
M4
1.5
2-4
2-4
FR-F740/746-00170-EC
M4
1.5
5.5-4
5.5-4
FR-F740/746-00250-EC
M4
1.5
5.5-4
5.5-4
FR-F740/746-00310-EC
M5
2.5
8-5
8-5
FR-F740/746-00380-EC
M5
2.5
14-5
8-5
FR-F740/746-00470-EC
M6
4.4
14-6
14-6
FR-F740/746-00620-EC
M6
4.4
22-6
22-6
FR-F740/746-00770-EC
M6
4.4
22-6
22-6
FR-F740/746-00930-EC
M8
7.8
38-8
38-8
FR-F740/746-01160-EC
M8
7.8
60-8
60-8
FR-F740-01800-EC
M8(M10)
7.8
60-8
60-8
FR-F740-02160-EC
M10
14.7
100-10
100-10
FR-F740-02600-EC
M10
14.7
100-10
150-10
FR-F740-03250-EC
M10(M12)
14.7
150-10
150-10
FR-F740-03610-EC
M10(M12)
14.7
150-10
150-10
FR-F740-04320-EC
M12(M10)
24.5
100-12
100-12
FR-F740-04810-EC
M12(M10)
24.5
100-12
100-12
FR-F740-05470-EC
M12(M10)
46
150-12
150-12
FR-F740-06100-EC
M12(M10)
46
150-12
150-12
FR-F740-06830-EC
M12(M10)
46
200-12
200-12
FR-F740-07700-EC
M12(M10)
46
C2-200
C2-200
FR-F740-08660-EC
M12(M10)
46
C2-250
C2-250
FR-F740-09620-EC
M12(M10)
46
C2-250
C2-250
FR-F740-10940-EC
M12(M10)
46
C2-200
C2-200
FR-F740-12120-EC
M12(M10)
46
C2-200
C2-200
