78
Measurements; weight
ca. 19.6 x 8.3 x 11.7 cm;
ca. 449 g
15.1. Symbols on the type plate and
power pack
Protection class II
Electrical devices in protection class II are
devices that have double and/or rein-
forced 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 in-
sulating material, might 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 power
connectors, these symbols indicate the po-
larity of the connector. There are two types
of polarity: either positive inside and nega-
tive outside (Fig. A), or negative inside and
positive outside (Fig. B).
