Wire Ferrules
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Ferrules should only be used on stranded wire!
A wire ferrule is a metal tube crimped over stranded wire to secure the strands together. Some may have electrical insulation to protect against any exposed conductor.
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Ferrules may cause a voltage drop under high load, due to most connection methods having minimal contact area with them, which should be taken into consideration.
Variants & Vendors
Ferrules come in many sizes, such as these:
Some ferrules may come without insulation, such as this one:
- 12 AWG ferrule AM-2027 (opens in a new tab)
Tools
Ferrules should be crimped with an appropriate crimping tool AM-3739 (opens in a new tab).
Remember to always tug-test electrical crimps and connections.
Usage
Steps to crimping a ferrule:
- Strip your stranded wire the same length as the contact portion of your ferrule.
- Insert the strands of wire into an appropriately sized wire ferrule.
- Insert the wire ferrule, which is over the stranded wire, into the crimp-tool.
- Crimp the wire ferrule, this should affix the wire ferrule onto the wire.
- Tug-test the wire ferrule.
For more information on how to crimp & use a ferrule, refer to this youtube video (opens in a new tab).