SAGEM 3P@C

Figure 5-6 Direct overhead cabling from the outdoors of the top of a buildings to the bottom floor without any protection

5.5. Other Requirements for Outdoor Cabling

When connecting devices located in different buildings, you are recommended to use optical cables for overhead cabling,

Note and don’t need to install any lightning arrestor.

If you cannot provide the optical fiber cable for outdoor cabling and have to use the twisted pair, pay attention to the following cabling requirements:

If the shielding of Ethernet cables is required outdoors, you need to do as follows: Parallelize a steel wire outside the PVC pipe and connect the wire with the lightning protection grounding of the building, in this way the inductive lightning can be conducted the to the ground through the steel wire.

The Ethernet cables entering a building must be laid in a weak electricity metal rack or tube. The metal rack or tube serves as the shielding layer of the cable and should be connected appropriately with integrated grounding system. Note that the weak electricity conducting cable cannot share metal rack or tube with the strong electricity conducting cable.

If you cannot provide the optical fiber cable for outdoor cabling and have to use the twisted pair, it is strongly

Note recommended to use the external lightning arrester for lightning protection of the equipment. See the next section for its installation. The external lightning arrester should be provided by users themselves.

5.6. Installing External Lightning Arrester

The external lightning arrester is installed between the signal channel and the protected equipment using a serial connection. The following figure shows its connection.

Figure 5-7 Connection of the external lightning arrester

 

Device

External cable

Transfer cable

External lightning arrester

 

For specific installation procedure and precautions of the external lightning arrester, see the product instructions. The basic installation procedures are as follows:

3P@C Installation Manual

Page 5-4 Reproduction and communication in any form prohibited without the written permission of SAGEM SA