# Cables And Wiring Length - Mitsubishi Electric FR-A701 Instrucion Manual

Main circuit terminal specifications
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)
Terminal
Applicable Inverter
Screw
Type
Size
FR-A721-5.5K
M5
FR-A721-7.5K
M5
FR-A721-11K
M5
FR-A721-15K
M6
FR-A721-18.5K
M8(M6)
FR-A721-22K
M8(M6)
FR-A721-30K
M8(M6)
FR-A721-37K
M10(M8)
FR-A721-45K
M10(M8)
FR-A721-55K
M12(M8)
*1
The cable size is that of the cable (HIV cable (600V class 2 vinyl-insulated cable) etc.) with continuous maximum permissible temperature of
75°C. Assumes that the surrounding air temperature is 50°C or less and the wiring distance is 20m or less.
*2
The recommended cable size is that of the cable (THHW cable) with continuous maximum permissible temperature of 75°C. Assumes that the
surrounding air temperature is 40°C or less and the wiring distance is 20m or less.
(Selection example for use mainly in the United States.)
*3
For the 15K or less, the recommended cable size is that of the cable (PVC cable) with continuous maximum permissible temperature of 70°C.
Assumes that the surrounding air temperature is 40°C or less and the wiring distance is 20m or less.
For the 18.5K or more, the recommended cable size is that of the cable (XLPE cable) with continuous maximum permissible temperature of 90°C.
Assumes that the surrounding air temperature is 40°C 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 earthing (grounding).
A screw for earthing (grounding) of the 18.5K or more is indicated in (
400V class (when input power supply is 440V)
Terminal
Applicable Inverter
Screw
Type
Size
FR-A741-5.5K
M4
FR-A741-7.5K
M4
FR-A741-11K
M5
FR-A741-15K
M5
FR-A741-18.5K
M6
FR-A741-22K
M6
FR-A741-30K
M6
FR-A741-37K
M8
FR-A741-45K
M8
FR-A741-55K
M8
*1
The cable size is that of the cable (HIV cable (600V class 2 vinyl-insulated cable) etc.) with continuous maximum permissible temperature of 75°C.
Assumes that the surrounding air temperature is 50°C or less and the wiring distance is 20m or less.
*2
For the 45K or less, the recommended cable size is that of the cable (THHW cable) with continuous maximum permissible temperature of 75°C.
Assumes that the surrounding air temperature is 40°C or less and the wiring distance is 20m or less.
For the 55K, the recommended cable size is that of the cable (THHN cable) with continuous maximum permissible temperature of 90°C. Assumes that
the surrounding air temperature is 40°C or less and wiring is performed in an enclosure.
(Selection example for use mainly in the United States.)
*3
For the 45K or less, the recommended cable size is that of the cable (PVC cable) with continuous maximum permissible temperature of 70°C. Assumes
that the ambient temperature is 40°C or less and the wiring distance is 20m or less.
For the 55K, the recommended cable size is that of the cable (XLPE cable) with continuous maximum permissible temperature of 90°C. Assumes that
the ambient temperature is 40°C or less and wiring is performed in an enclosure.
(Selection example for use mainly in Europe.)
16
Crimping
Terminal
Tightening
Torque N·m
R/L1,
*4
U, V, W
S/L2,
T/L3
2.5
5.5-5
5.5-5
2.5
14-5
8-5
2.5
14-5
14-5
4.4
22-6
22-6
7.8
38-8
38-8
7.8
38-8
38-8
7.8
60-8
60-8
14.7
80-10
80-10
14.7
100-10 100-10
24.5
100-12 100-12
Crimping
Terminal
Tightening
Torque N·m
R/L1,
*4
U, V, W
S/L2,
T/L3
1.5
2-4
2-4
1.5
5.5-4
5.5-4
2.5
5.5-5
5.5-5
2.5
8-5
8-5
4.4
14-6
8-6
4.4
14-6
14-6
4.4
22-6
22-6
7.8
22-8
22-8
7.8
38-8
38-8
7.8
60-8
60-8
Cable Sizes
2
AWG/MCM
HIV, etc. (mm
)
*1
Earth
R/L1,
R/L1,
U, V, W
(Ground)
S/L2,
S/L2,
T/L3
T/L3
cable
5.5
5.5
5.5
14
8
14
14
14
14
22
22
14
38
38
22
38
38
22
60
60
38
80
80
38
100
100
60
100
100
60
).
Cable Sizes
2
AWG/MCM
HIV, etc. (mm
)
*1
Earth
R/L1,
R/L1,
U, V, W
(Ground)
S/L2,
S/L2,
Cable
T/L3
T/L3
2
2
3.5
3.5
3.5
3.5
5.5
5.5
8
8
8
8
14
8
14
14
14
14
22
22
14
22
22
14
38
38
22
60
60
22
PVC, etc. (mm
*2
R/L1,
U, V, W
U, V, W
S/L2,
T/L3
10
10
6
6
6
8
16
10
6
6
16
16
4
4
25
25
2
2
35
35
2
2
35
35
1/0
1/0
50
50
3/0
3/0
70
70
4/0
4/0
95
95
4/0
4/0
95
95
PVC, etc. (mm
*2
R/L1,
U, V, W
U, V, W
S/L2,
T/L3
12
14
2.5
2.5
12
12
4
4
10
10
6
6
8
8
10
10
6
8
16
10
6
6
16
16
4
4
25
25
4
4
25
25
1
2
50
50
1/0
1/0
50
50
2
)
*3
Earth
(Ground)
cable
6
16
16
16
25
25
25
35
50
50
2
)
*3
Earth
(Ground)
Cable
4
4
10
10
16
16
16
16
25
25