14
Gigabit Unmanaged Switch
Requirements for Cabling Indoors
■
When cabling indoors, keep a certain distance away from the devices that may cause
high-fr equency inte rfere nces, such as down-co nducto r cab le, p owerlin e, po wer
transformer and electromotor.
The main cab le should be paved in the metal raceway of t he access shaft. When
■
cabling, keep the loop area formed by the cable itself as small as possibl e.
Requirement s for the di stance between Ethernet cable and o ther pip elines are
■
shown in the table.
Other Pipelines
Ethernet Cable
Min Parallel Net Length L
(mm1
Min Parallel-overlapping
Net Height H (mm1
Down-conductor 1000 300
PE 50 20
Service pipe 150 20
Compressed air pipe 150 20
Thermal pipe (not wrapped1 500 500
Thermal pipe (wrapped1 300 300
Gas pipe 300 20
The two diagrams below demonstrate parallel net length and parallel-overlapping net
height.
Note: The ab ove minimum net length/height is required when metal raceway is not
used. If any requirement s cannot be met, you can add a steel tube or metal raceway
for shielding.
Requirement s for the dis tance b etween Ethernet cable a nd high-p ower ele ctric
■
devices are in following tables.
Cable Pave Way Min Parallel
Length (mm1
<2kVA
powerline
Parallel cabling 130
One is in the grounded metal raceway or metal pipe F0
The both are in the grounded metal raceway or metal
pipe 10
Lightning Protection