Steel conduits
The power cables from the three Power Supply Unit to the Transceiver Unit must be run in steel conduits.
These conduits serve the following purposes:
•  Noise and interference protection
•  Physical protection
The minimum internal diameter of the steel conduits is 5 cm.
Note
The maximum length of unprotected cable is 1 meter in each end of the conduit. For this reason, separate conduits for each Power Supply Unit is required.