Crimping Wires

[PJW]

This may be in the wrong place but am new here not sure how open a new post. Anyway could some one tell me the actual length of the bare wire when crimping I have been to different lengths

Thank you

Certainly there would be a better place to put this post, but I can move it later.
If you are asking the length of insulation that an installer should strip from a wire before crimping it, then I think it depends on the crimp into which it is to fit.
You may be thinking f a "Westinghouse" relay spade (connector BR831) that then fits into a relay plugboard, or perhaps a red or a blue ring crimp, pin crimp etc. and I think the answer would be different.

If I were to do it (and I am not a trained installer) then I;d do a test crimp having stripped a length that looked about right and then see what the end result was like; then make another attempt having learnt from that. Basically the insulation must be contained within and generally gripped by the portion of the crimp designed to do it and the wires themselves protrude slightly beyond the section of the crimp that is designed to make firm contact with them. I don't think there is a minimum re how much they should protrude but I would say at least 1mm. There is certainly a maximum as otherwise they will splay out and potentially foul other things (such as a nut being used to hold the ring crimp onto a terminal. Typically 5mm would certainly be too long. Hence in short for the end result you ought to see just a little wire protruding beyond the crimp section- but how long you need to strip initially is something I would only find out by trial and error, but having found it for particular type of crimp then that is what I would then go on to use. In reality, experienced installers just do it by eye.