Wireless Controller
11
Lightning Protection
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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.
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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.
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Requirements for the distance between Ethernet cable and other pipelines are shown
in the table.
Other Pipelines
Ethernet Cable
Min Parallel Net Length
L (mm)
Min Parallel-overlapping
Net Height H (mm)
Down-conductor
1000
300
PE
50
20
Service pipe
150
20
Compressed air pipe
150
20
Thermal pipe (not wrapped) 500
500
Thermal pipe (wrapped)
300
300
Gas pipe
300
20
The two diagrams below demonstrate parallel net length and parallel-overlapping
net height.
Note:
The above minimum net length/height is required when metal raceway is not
used. If any requirements cannot be met, you can add a steel tube or metal
raceway for shielding.
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Requirements for the distance between Ethernet cable and high-power electric devices
are in following tables.
Cable
Pave Way
Min Parallel
Length (mm)
<2kVA
powerline
Parallel cabling
130
One is in the grounded metal raceway or metal pipe
70
The both are in the grounded metal raceway or
metal pipe
10
