Did somebody mention BS7671 ?
Would you not agree that any connections made inside a CU are accessible (526.3)?
If so then you could just as easily use through screw terminal connectors.
If you are so desperate to use crimp connectors then I would suggest for conductors up to 6.0mm2, that you make up some test leads of about 1m joined together with a through crimp. (try both single core, not > 4.0mm2, and multi-stranded conductors)
Stand on one end and give the other a good tug. If it holds out then its tough enough to be used as a through crimp connection. If it doesn't then either your crimping method is not up to scratch or/and you are using the wrong crimper.
Would you not agree that any connections made inside a CU are accessible (526.3)?
If so then you could just as easily use through screw terminal connectors.
If you are so desperate to use crimp connectors then I would suggest for conductors up to 6.0mm2, that you make up some test leads of about 1m joined together with a through crimp. (try both single core, not > 4.0mm2, and multi-stranded conductors)
Stand on one end and give the other a good tug. If it holds out then its tough enough to be used as a through crimp connection. If it doesn't then either your crimping method is not up to scratch or/and you are using the wrong crimper.