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3. 3 Precaution for wiring
The power cable and the control cable of an inverter can act as antennas to radiated
interference, and on the contrary, they can radiate interference to outside, so the
appropriate measures must be taken. Especially, the cable between the inverter and the
motor can be a strong interference source. Perform wiring by considering the following
points.
(1) For the power cable, use a shielded cable or use metal conduit to shield the cable.
(2) When connecting the shield or the metal conduit of the power cable to the enclosure,
use a P-clip or U- clip to ground (earth) as close as possible. P-clip or U-clip should
be placed within 10cm from the enclosure as a reference.
(3) The cable between the inverter and the EMC filter should be 50cm or less.
●Example of a cable gland
●Example of P-clip and U-clip
Earth (ground)
example using P-clip
Enclosure surface
Cable gland
P-clip
Earth (ground)
example using U-clip
3 - 4
U-clip
Tying and stretching
shield for
earthing(grounding)
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