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Maintenance free approach to jointing different CSA conductors

psychicwarrior

Good day

An effective and regulation justifiable maintenance free joint of differing CSA e.g. 10mm to 4mm: is it realistic and if so what might satisfy please and specifically the splice approach (crimp, screw terminal , etc) ?

(A similar  question some time back produced the suggestion of a compound filled joint perhaps - but that was for matching CSA )

Or is it a case (as it feels) that a joint like this really ought to be accessible for maintenance because of its factors ?

Thank you.

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    Tinning a flexible stranded conductor into a solid mass makes it mechanically weak at the point the stiff bit meets the untinned part and prone to failure there. Of course if the wiring is loomed and only vibrates, rather than flexes, it is a perfectly sensible thing to do, and when done correctly fine for aircraft, space vehicles and a great many situations.It is not a suitable technique for the inexperienced, hence it being the last in my list. Soldered joints in that case must be stiffened by heatshrink sleeves or rubber, or similar so there is no flex on the strands at the solder neck. Using it as a poor substitute  for a ferrule without any such precaution is not usually wise.

    Mike.

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  • 0

    Tinning a flexible stranded conductor into a solid mass makes it mechanically weak at the point the stiff bit meets the untinned part and prone to failure there. Of course if the wiring is loomed and only vibrates, rather than flexes, it is a perfectly sensible thing to do, and when done correctly fine for aircraft, space vehicles and a great many situations.It is not a suitable technique for the inexperienced, hence it being the last in my list. Soldered joints in that case must be stiffened by heatshrink sleeves or rubber, or similar so there is no flex on the strands at the solder neck. Using it as a poor substitute  for a ferrule without any such precaution is not usually wise.

    Mike.

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