Mitsubishi Electric FR-F 740 Series Installation Manuallines page 11

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
FR-F 740/746-00023–00083-EC
FR-F 740/746-00126-EC
FR-F 740/746-00170-EC
FR-F 740/746-00250-EC
FR-F 740/746-00310-EC
FR-F 740/746-00380-EC
FR-F 740/746-00470-EC
FR-F 740/746-00620-EC
FR-F 740/746-00770-EC
FR-F 740/746-00930-EC
FR-F 740/746-01160-EC
FR-F 740-01800-EC
FR-F 740-02160-EC
FR-F 740-02600-EC
FR-F 740-03250-EC
FR-F 740-03610-EC
FR-F 740-04320-EC
FR-F 740-04810-EC
FR-F 740-05470-EC
FR-F 740-06100-EC
FR-F 740-06830-EC
FR-F 740-07700-EC
FR-F 740-08660-EC
FR-F 740-09620-EC
FR-F 740-10940-EC
FR-F 740-12120-EC
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Terminal Screw Size *
M4
M4
M4
M4
M5
M5
M6
M6
M6
M8
M8
M8
M10
M10
M10
M10
M12/M10
M12/M10
M12/M10
M12/M10
M12/M10
M12/M10
M12/M10
M12/M10
M12/M10
M12/M10
Tightening Torque
[N·m]
R/L1, S/L2, T/L3
1.5
1.5
1.5
1.5
2.5
2.5
4.4
4.4
4.4
7.8
7.8
7.8
14.7
14.7
14.7
14.7
24.5
24.5
24.5
24.5
24.5
24.5
24.5
24.5
24.5
24.5
WIRING
Crimping Terminal
U, V, W
2-4 2-4
2-4 2-4
5.5-4 5.5-4
5.5-4 5.5-4
8-5 8-5
14-5 8-5
14-6 14-6
22-6 22-6
22-6 22-6
38-8 38-8
60-8 60-8
60-8 60-8
100-10 100-10
100-10 150-10
150-10 150-10
150-10 150-10
100-12 100-12
100-12 100-12
150-12 150-12
150-12 150-12
200-12 200-12
C2-200 C2-200
C2-250 C2-250
C2-250 C2-250
C2-200 C2-200
C2-200 C2-200
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