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Pigtailing Electrical Cables

prephil
I've just read a Festo EMC Checklist guide which recommend the following:


Are cable reserves wound up as coils? If so uncoil, fold in the middle and wind back up doubled over (bifilar winding).


Does this mean that pigtailing cables is bad practice?
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    Pigtailing a wire can significantly increase its inductance, and so increase the impedance at high frequencies.

    X = 2 π f L

    X is impedance, f is frequency and L is inductance.


    If you're concerned with EMC, then increasing the impedance may mean that your connection doesn't do what it was intended to - and I'm thinking about grounding connections particularly.
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  • 0
    Pigtailing a wire can significantly increase its inductance, and so increase the impedance at high frequencies.

    X = 2 π f L

    X is impedance, f is frequency and L is inductance.


    If you're concerned with EMC, then increasing the impedance may mean that your connection doesn't do what it was intended to - and I'm thinking about grounding connections particularly.
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