I must say since I have the CK strips Matty mentioned I use them for most T&E now. It depends how much you need to strip off. More than 6 inches, then its another method (or multiple uses of the strippers). I mostly pull the CPC with the side snips but depending on access do also use the knife method. Was told that pulling cpc was frowned upon now as it can reduce the CSA of the cable as its stretched. Bet the knife method raises eyebrows with H&S too.