8 Guidelines for electrical installation
8.1 General notes
XI/ON: XNE-GWBR-2ETH-IP
09/2011 MN05002007Z-EN
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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 surfaces (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 AC 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.
