16
Connecting alu-
minium cables
The DC-side terminals are suitable for connecting single-wire, round aluminium cables.
Because of the formation of a non-conductive oxide layer due to the reaction of aluminium
with air, the following points must be considered when connecting aluminium cables:
- the reduced rated currents for aluminium cables
- the connection conditions listed below
NOTE!
Always follow the cable manufacturer instructions when using aluminium cables.
NOTE!
When designing cable cross-sections, take local regulations into account.
Connection conditions:
Carefully clean the oxide layer from the bare end of the cable by scraping it, e.g. with
a knife
IMPORTANT! Do not use brushes, files or emery paper, as the aluminium particles get
trapped and can be transferred to other conductors.
Once the oxide layer is removed, rub the end of the cable with a neutral grease, such
as non-acidic and non-alkaline Vaseline
Immediately connect the cable end to the terminal
IMPORTANT!
Repeat the procedure if the cable has been disconnected and is to be re-connected.
Notes regarding
dummy devices
A dummy device is not suitable for connecting operationally to a photovoltaic system, and
must only ever be used for demonstration purposes. Dummy devices are indicated as such
on their rating plate.
IMPORTANT! Never connect DC cables to the DC connection sockets on a dummy de-
vice.
The connection of de-energised cables or sections of cable for demonstration purposes is
permissible.
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