
B-65282EN/05 APPENDIX E.POWER LINE FOR SERVO MOTOR AND AMPLIFIER
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E.1 SELECTING A POWER CABLE
Select the cable specification by considering the following conditions
for use:
<1> Motor current rating or current needed in use on a real machine
<2> Cable type (heat resistance temperature, etc.)
<3> Environment in which the cable is installed (operating ambient
temperature, etc.)
<4> Need of water proofing (pay attention to the diameter of the
applicable cable clamp)
<5> Certification for CE marking (compliance with various safety
standards and EMC standard)
<6> Insulation distance between the cable and terminal is secured at
the time of wiring.
Examples of selecting a heavy-duty power cable are shown below.
Fully check the cable specifications based on the actual use
conditions and use an example below.
The cable diameters are determined based on JCS No. 168 D (1980),
"Allowable Currents for Power Cables (1)."
Selection example of power line (reference)
[Selection example 1]
• Heavy-duty power cable specification :
Maximum allowable conductor temperature 60°C
• Environment temperature : 30°C
Cable diameter
[mm
2
]
Allowable
current value
[Arms]
Receptacle contact
specification
0.75 Up to 11 SS size 1318986-6
1.25 Up to 15 S size 316040-6
2 Up to 19 S size 316040-6
3.5 Up to 27 M size 316041-6
5.5 Up to 35 M size 316041-6
8 Up to 43 L size 1318697-6
[Selection example 2]
• Heavy-duty power cable specification :
Maximum allowable conductor temperature 80°C
• Environment temperature : 55°C
Cable diameter
[mm
2
]
Allowable
current value
[Arms]
Receptacle contact
specification
0.75 Up to 9.2 SS size 1318986-6
1.25 Up to 12.7 S size 316040-6
2 Up to 16.3 S size 316040-6
3.5 Up to 23.4 M size 316041-6
5.5 Up to 31.2 M size 316041-6
8 Up to 38.3 L size 1318697-6