2N NetStar Hardware manual - Manual (Page 47)

47
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!!!