39
2020/09
8 Guidelines for Electrical Installation
8.1
General notes
8.1.1
General
Cables should be grouped together, for example: signal cables, data cables, heavy current cables,
power supply cables.
Heavy current cables and signal or data cables should always be routed in separate cable ducts or
bundles. Signal and data cables must always be routed as close as possible to ground potential sur
-
faces (for example support bars, cabinet sides etc.).
8.1.2
Cable routing
Correct cable routing prevents or suppresses the reciprocal influencing of parallel routed cables.
Cable routing inside and outside of cabinets
To ensure EMC-compatible cable routing, the cables should be grouped as follows:
Various types of cables within the groups can be routed together in bundles or in cable ducts.
Group 1:
shielded bus and data cables
shielded analog cables
unshielded cables for DC voltage
60 V
unshielded cables for AC voltage
25 V
Group 2:
unshielded cables for DC voltage > 60 V
and
400 V
unshielded cables for DC voltage > 25 V
and
400 V
Group 3:
unshielded cables for DC and AC voltages
> 400 V
The following group combination can be routed only in separate bundles or separate cable ducts
(no minimum distance apart):
Group 1/Group 2
The group combinations:
Group 1/Group 3 and Group 2/Group 3
must be routed in separate cable ducts with a minimum distance of 10 cm apart. This is equally valid
for inside buildings as well as for inside and outside of switchgear cabinets.
Summary of Contents for BL20-ECO
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