ELECTRICAL INSTALLATION
PRODUCT
PCS6000
DOCUMENT KIND
User manual
DOCUMENT ID.
3BHS600000 E40
REV.
G
LANG.
en
PAGE
Figure 6–2 Segregation of cables of different classes
NOTE – Fig. 6–2 shows the minimum spacings for cables that are run close to a PEC for up
to a 30 m distance. For longer runs, multiply by
.
The spacings can be reduced if a shield is installed between cable groups of different
classes.
Cables of different classes should only – if at all – cross at a right angle, in order to keep the
mutual influence as small as possible.
6.5.1. Summary
Table 6–1 summarizes the individual cable types and - where applicable - their shielding and
its connection:
1) Class 1 cables
2) Class 2 cables
3) Class 3 cables
4) Class 4 cables
Table 6–1 Cable types and shielding method
Use
Class
Shield
Shield connection
Installation type
Signal cable to and from
switchgear / CT/VT
2
Yes
On both sides
Auxiliary power supply cable
3
Yes
On both sides
Cable duct along
grounded metal parts
Cable for relay contacts
4
Yes
On both sides
Cable duct along
grounded metal parts
Lighting, motor starter, heating
units
4
Yes
On both sides
Cable duct along
grounded metal parts
1
2
3
4
5
150 mm
150 mm
600 mm
450 mm
300 mm
450 mm
Length (in meters)
30
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