My UT139C has an NCV, my Fluke 87V does not. Guess what I use for NCV testing?
That's right, my Fluke VoltAlert voltstick.
When you've a bundle of 50+ cables in some trunking, getting a full size hand-held meter inside, and onto one specific cable is not a realistic proposition. A voltstick is small enough to do this.
It's about using the right tool for the job, and I'd bet 99% of people who aren't electricians but are using NCV, get a false sense of safety from using one. They have their limitations, and in all honesty even most of the sparkies I know don't use them correctly. I frequently have to remind people to prove them prior to each use.
I like AvE's videos, but he's not an electrician or EE. Nevertheless I have an instinctive distrust of those T6's, as it seems to me they've introduced the potential for a dangerous user error mode. This vid gets straight to the point:
I'll stick to my T5, thanks.