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AL EM aluminum pipe couplings (according to DIN 46267) are used for butt-joining two conductors of the same cross-section. The use of pipe connectors increases the safety of the connection and its durability. It is important to remember that this type of connection cannot be mechanically loaded.
The effectiveness of crimping (fixing the terminal on the cable) depends on the use of an appropriate tool and a die adapted to the cross-section.