I then attempted some new cable to make sure that it was not all bent up. This went in rather nicely to both of those 20mm and 25mm, no genuine variation, nonetheless it did get some power at one particular or two details for getting it through a 2m length. https://andreslbpds.bloggazza.com/28485308/how-much-you-need-to-expect-you-ll-pay-for-a-good-mini-trunking-accessories