To protect the stripped ends of stranded conductors, ferrules are used. Thus, the stranded cables can be connected easily and without damaging the individual wires in the terminals.
Ferrules are available in insulated or uninsulated design. Wire end sleeves with protective collar (colored) also provide additional kink protection for the connected wire. The colored marking of the protective collar simultaneously provides information about the maximum wire or conductor cross-section. There are three different, partly conflicting colors. In the specialist trade, color coding to DIN standard 46228 is increasingly gaining acceptance.
Here is a list of the three different colors:
|Cross-section||French color code||German color code||DIN-Norm 46228|
|0,25 mm²||violet||light blue||yellow|
Likewise, ferrules have different types of length:
- N - Normal length
- K - short version
- HL - half-length version
- L - long version
If a slightly thicker cable is to be reduced, since the connection possibility is designed for a thinner cable, one can resort to pin terminals. Pin terminals are thus an alternative to wire end sleeves.
To ensure a perfect connection of a fine-stranded copper conductor (stranded wire), ferrules are used. Another advantage of the sleeves is that the conductivity is improved. Likewise, insulated ferrules bear the operational safety of electrical systems, control cabinets, electronic components, or the like. at. Even with multiple reconnection / screwing in the terminal or screw terminal cable breaks and vibration damage are avoided and a good contact resistance is guaranteed.