MC-Sockets type BL...A are distinguished by their simple handling.
To make contact, the plugs S...N or SP...N are simply pushed-in and to disconnect, are pulled-out.
BL...A sockets are pressed directly into the appropriate holes.
Suitable applications are in tubes as tubular joint connection (e.g. in busbars installations), in contact blocks, conductor rails, etc.
The holes should be silver-plated for an optimum contact.
However, it is possible to make contact with unplated materials (also aluminium!)
in not korrosive atmosphere when the contact surfaces are covered with grease and are kept free from oxidation and humidity.