Guidelines for arranging the cables in cable channels
Sensitive cables (classes 1 and 2) must be installed in the corners of the cable duct:
Guidelines for connecting cable ducts
Connecting cable ducts must be carried out when necessary i.e. direct bonding by bolted fastening.
NOTE: The earthing of cable ducts must be carried
out when necessary, see Direct bonding by bolted fastening for metallic parts.
Non metallic cable ducts
NOTE: Cable ducts that are not electrically conductive
such as PVC tubes, plastic skirting boards or similar, are not recommended
as they offer no shielding. For example, they can be used in existing
systems but only with a maximum run length of 3 m.
Recommended cable ducts
The following cable ducts are recommended:
Steel conduit  |
Steel cable duct  |
Trunking  |
Steel cable duct  |
Buried cable  |
Cable tray or steel trays  |
Underground channel, closed  |
Underground channel, open or ventilated  |