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Practical tips

Using Ferrules

The conductor specifications for splicing connectors always apply to untreated copper conductors, which can be connected to the splicing connector after being stripped. For use of ferrules, the following points must be observed.

It is necessary to use tubular tin-plated copper ferrules, with or without plastic collars, per DIN 46228-1 and -4.

Tubular copper ferrule without plastic collar (DIN 46228-1)

Tubular copper ferrule with plastic collar (DIN 46228-4)

Blanket approval for the use of ferrules is not possible, since a number of important points need to be considered.

  • The length of the ferrule must correspond to the specified strip length. If the conductor is too long, the required insulation is not achieved; if the conductor is too short, a secure connection is not guaranteed. The strip length is always printed on the connector.
  • The maximum conductor cross-section that can be accommodated is reduced: A ferrule increases the diameter of the conductor. Therefore, it is not possible to fit the maximum cross-section of an untreated conductor.
  • The maximum conductor cross-section for ferrules with and without plastic collars can vary; ferrules with plastic collars may reduce the maximum cross-section further, since the plastic collar may prevent the conductor from being fully inserted.

  • The conductor should always be inserted in a specific way: The best contact is ensured when the crimp surface is parallel to the contact surface.
  • The conductor should be grasped briefly and inserted, using tools if necessary: If too much length of the conductor is clamped, there is a risk of it buckling above the ferrule and damaging the conductor.
  • A gas-tight crimping method must be selected: A gas-tight connection ensures a durable and secure contact, e.g., with the WAGO Variocrimp 4 Crimping Tool (item number 206-1204).

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