Ascotel IntelliGate 2025/2045/2065
Part 4 Earthing and protecting the PBX 721
[1] Earthing (copper wire 2.5 mm
2
, yellow / green)
Fig. 4.12: Earthing for direct connection (left) and indirect connection (right) of the building
cable installation
Note:
Earthing in a connection to a universal building cable installation corre-
sponds to earthing in a connection via main distribution board.
3.2 Connecting the cable screening
Connect the cable screens to one another at the splitting point only. Observe the
tree structure principle to prevent earth loops.
230 VAC
Socket
PBX
[1]
Direct connection
haz1104aaenb0
Protective conductor
building earth
230 VAC
Socket
PBX
Indirect connection
haz1105aaenb0
main distribution board
or
isolating point
Protective conductor
building earth
[1]
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