Next time you strip a twin and Earth by yanking the cpc up through the outer sheath, compare the length of the cpc to the live/neutral. IT WILL SOMEHOW BE LONGER!! It magically gains up to an inch in length. Strain on cable?
The proper way to strip twin and earth is to run a sharp Stanley knife down the middle of the cable using the cpc as a guide. It takes a day to get used to but you will notice how much better it is for the cable. I'd say 98% strip with side cutters haha, this could be the start of something!!
Nonsense!
To get the cpc to stretch by an inch over such a short length would cause it to snap.