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Mounting and installation information for junction boxes
Open-air systems
Important protection requirements:
In protected outdoor areas, resources must at least be
protected against water droplets (protection rating IPX1).
In unprotected outdoor areas, resources must at least be
protected against spray water (protection rating IPX3).
The requirements for protection through an automat-
ic switch-off of the power supply are listed in DIN VDE
0100-470 (VDE 0100-470):1996-02 and, amongst other
things, apply to
• outdoor sockets,
• sockets occasionally used to supply portable
resources outdoors can be expected.
In addition, ventilation and/or drainage is essential!
Examples of unprotected outdoor installations:
Roads, paths and squares, throughways and gardens,
construction locations, platforms, ramps and roofs, con-
struction machines, petrol stations and buildings.
Examples of protected outdoor areas:
Systems on covered platforms, gateways and covered
petrol stations, houses or buildings with a sufficient roof
overhang/with additional weather protection.
3.6. Photovoltaic systems according to DIN VDE
0100-712
Important protection requirements:
The periphery of PV systems is primarily mounted out-
doors. For this reason, there are the following important
protection requirements:
• External influences that are to be expected, such as
wind, ice formation, temperature and sunlight, must
be taken into account.
• In PV systems, it is essential that the heat created by
direct sunlight is dissipated.
All connection/junction boxes must be provided with a
warning that active parts in the boxes could still be ener-
gised after the PV inverter is disconnected.
The requirements for switching off the PV system for
maintenance work can be found in VDE 0100-712, Sec-
tion 53.
In addition, ventilation and/or drainage is essential!
Photovoltaic system
Protected outdoor area
