Table of Contents
Advertisement
Chapter 3 Lightning Protection
3.1 Cabling Reasonably
In the actual network environment, you may need cable outdoors and indoors, and
the requirements for cabling outdoors and indoors are different. A reasonable
cabling system can decrease the damage of induced lightning to devices.
Note: It's not recommended to use Ethernet cables outdoors. When cabling
outdoors, please use a signal lightning arrester.
Requirements for Cabling Outdoors
■
Aerial cabling without safeguard is not allowed.
■
It's not allowed cabling down the building to connect network devices in different
■
floors.
Outdoor cables should be buried and paved to the indoor through basement. A
■
piece of steel wire should be paved underground along the pipe and connected to
the lightning protection terminal of the building for shielding. Before connecting
the cable to the device, install a signal lightning arrester on the corresponding
port.
When an aerial cable is set up, the cable should be through a metal pipe (15m long
■
at least) before coming into the building. The two ends of this metal pipe should
be grounded. Before connecting the cable to the device, install a signal lightning
arrester on the corresponding port.
It's not necessary to pave STP cables through pipes. The shielded layer of STP
■
cable should be well grounded. Before connecting the cable to the device, install a
signal lightning arrester on the corresponding port.
Requirements for Cabling Indoors
■
When cabling indoors, keep a certain distance away from the devices that may
cause high-frequency interferences, such as down-conductor cable, powerline,
power transformer and electromotor.
The main cable should be paved in the metal raceway of the access shaft. When
■
cabling, keep the loop area formed by the cable itself as small as possible.
Gigabit L2 Managed Switch
Lightning Protection
11
Advertisement
Table of Contents
