Electrical Installation
‑148‑
If a multi‑conductor cable used to connect the equipment has any idle conductors,
connect all the idle (or spare) conductors to the equipotential bonding point, as
shown in the following figure.
Figure 7‑50 Treatment when a multi‑conductor cable has any idle core wires
Avoiding large loop area
For low‑level sensor signals and the relay signals sharing a common line, route two
cables as close as possible to prevent a large loop area. For analog signals, use
twisted pairs. For digital signals, ensure signal cables are routed close to each other.
Figure 7‑51 Avoiding large loop area
Laying multiple types of cables
For cables of different types, route the cables along the equipotential metal plate.
Separating different types of cables or separating cables in the same metal (zinc‑iron
or stainless steel) duct with metal separators can enhance the internal EMC
performance.
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