1.1.1 Copper cable (part four)

Cable routing inside buildings

The following must be observed when routing cables outside of control cabinets and inside of buildings:

1. The minimum spacing between two cables can be found in Table 1: Minimum spacing for cables (according to EN 50174) . In general, the risk of crosstalk is the lower, the greater the separation between the cables.
   
   
2. If the cables are routed in metal cable trays, the trays can be arranged directly next to each other.
   
   
   
   
3. If only one common metal cable tray is available for all categories, the spacing according to Table 1 must be followed. If this is not possible due to space, the different cable categories must be separated by using metal separators or partitions. The separators must be well-bonded to the tray with a large surface area.
   
   
   

4. Where cables must cross they should always do so at right angles.
   
   
   

5. The individual sub-system grounds and all metal cable trays must be connected to the building equipotential bonding system.
   
   
   
   
6. For this purpose, observe the notes about equipotential bonding in
   Chapter 2.6.