About these operating instructions
11
Comply with the notes in the operating
instructions.
Protection class II
Electrical devices in protection class II
are devices that have double and/or
reinforced insulation throughout, and
do not have the option of connecting
a protective earth. The housing of an
electrical device in protection class II,
with surrounding insulating material,
may either form all of the additional or
reinforced insulation, or part of it.
Indoor use
Devices with this symbol are intended
solely for indoor use.
Fig. A
Fig. B
Polarity markings
In the case of devices with coaxial pow-
er connectors, these symbols indicate
the polarity of the connector. There are
two types of polarity: either positive
inside and negative outside (Fig. A), or
negative inside and positive outside
(Fig. B).
