Avoiding loops between exposed conductive parts
To avoid loop between exposed conductive parts all cables must be installed near ground connections or ground cables.
The illustration shows an example of how cables are installed near ground connections:

Installing outgoing and return conductors next to each other
Outgoing and return conductors must always be installed close to each other.
The smallest possible intervals are guaranteed across the total run length by using 2-wire twisted wire cables.
The illustration shows how out and return conductors are installed closely next to each other. Parallel installation is only possible for signals of the same class.
