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2N TELEKOMUNIKACE a.s., www.2n.cz
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3.2 System Grouping
Of course, the system is also grounded via the power supply network (thanks to the
protective earth conductor – if this is connected to the outlet). However, such
grounding is not considered sufficient – with regard to the danger resulting from the
fact that the system may easily be disconnected from the power supply network
(over-voltage stemming from any line may thus easily be spread to the system chassis
and from there to any other line!).
ATTENTION!
The system should thus optimally be connected from the main
switchboard through a yellow-green conductor with a diameter of not less
than 4mm2 to the grounding ledge. In case of emergency the "earth"
should be connected by such conductor (i.e. non-disconnectedly) to at
least the closest power supply outlet (make sure that the outlet is
connected correctly).
The conductor should be attached to the system using the earthed
connector (on the backside of the system panel, marked with the
grounding symbol) that is to be fixed properly. The grounding should be
connected prior to the connection of any other wiring!!!
Summary of Contents for Netstar
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