2N Omega Lite - Installation Manual v1.5 - Manual (Page 43)

2N
®
- OMEGA Lite
Installation manual
Installation manual
43
www.2n.cz
7. Mounting PBX on wall
Using the drilling template (on scale 1:1), mark two holes on the wall (for
requirements for location see above, paragraph Selection of location for PBX). Using
an 8 mm masonry bit, drill holes and put rawlplugs in them. Screw the hanging
element of the PBX into the upper holes using two screws (it is fixed to the chassis
on delivery). Hang the PBX and secure it against being knocked off by screwing the
(screw M3) chassis to the hanging element. Finally add the cover.
7.1. Earthing PBX
As has already been stated, good earthing of the PBX chassis is very important
for the good functioning of the overvoltage protectors on the line modules. The PBX
is naturally also earthed through the mains network (as a result of the earth wire – if
it is connected to the plug). But this is not enough – for one thing in view of the
danger that the PBX could be easily disconnected from the mains (the overvoltage
from any line would then easily spread toe the chassis of the PBX and from there to
all other lines!), and the principle applies that earthing should be as good as
possible. The ideal solution is thus a yellow-green copper wire with a cross section
of at least 4 mm
2
, leading for example from an earthing strip in the main switchbox.
In an emergency it is necessary to at least earth it using such a wire (i.e., not