Dangerous Electrical Voltages - Alcatel 1850 TSS-320 Technical Handbook

A.2.3 Dangerous Electrical Voltages
A.2.3.1 Electrical Safety: Labelling
The following warning label is affixed next to dangerous voltages (>42.4 Vp; >60 Vdc).
If it is a Class 1 equipment connected to mains, then the label associated to it will state that the equipment
will have to be grounded before connecting it to the power supply voltage, e.g.:
A.2.3.2 Electrical safety: general rules
DANGER! Possibility of personal injury:
procedures for installation / turn-up and commissioning / maintenance of equipment parts where a.c. or
d.c. power is present, described in the relevant installation / turn-up and commissioning / maintenance
documents and the following general rules:
a) Personal injury can be caused by -48 V dc (or by 220 V ac if envisaged in the equipment). Avoid
touching powered terminals with any exposed part of your body.
b) Short circuiting, low–voltage, low–impedance, dc circuits can cause severe arcing that can result in
burns and/or eye damage. Remove rings, watches, and other metal jewelry before working with
primary circuits. Exercise caution to avoid shorting power input terminals.
A.2.3.3 Electrical safety: equipment specific data
Refer to para.5.1.2 on page 186.
Technical Handbook Common
Safety - EMC - ESD norms and labels
The symbols presented in para.A.2.3 through A.2.7 are all the possible symbols
that could be present on Alcatel equipment, but are not all necessarily present
on the equipment this handbook refers to.
WARNING !
Ground protect the equipment before con-
necting it to mains
Make sure that power has been cut off before
disconnecting ground protection.
carefully observe the specific
Alcatel 1850 TSS-320 Rel. 1.1
8DG 07734 AAAA Edition 01 231/270