9. should subjected
to particularly critical investigations beforehand. addition, the local conditions may
differ greatly that general exposure test cannot defined. The risk
of harm from plants, algae mould must therefore considered.1, experience empirical
evidence shows that plants and/or mould growth can cause damage,
the cable and conductor system must selected accordingly
or special protective measures must provided.
The protection rating tests carried out according DIN 60529 are
used comparative tests and for classification properties.
Notes for outdoor installation
The information the type protection and UV-resistance are
often considered the only important aspects for outdoor installations. addition impairments through
UV-effects, outdoor installations damage expected arise
predominantly result chemical influences. The tests
are limited few minutes and cannot emulate exposure rain snow
or cleaning with water jets.
According DIN VDE 0100-520, 522.69
Protection against plants and/or mould growth
The plastics used electrical installation are organic materials. So, the outside
areas the vicinity filling stations, chemical facilities, landfill
sites, compressors, sewerage treatment plants etc.
. increase the service
life the enclosure, advantageous install the enclosure
in area that protected from weather influences. Comment: cable laying
method that allows appropriate removal such vegetation should
be selected.
However, outdoor installations, other factors such absolute temperature,
frequency temperature change, air humidity and chemical influences in
particular play important role
