I use a non contact tester for 120 stuff in "safe" situations. Where there may be higher voltages or I am outside or could be grounded somehow I use a fluke 23 or 87. I also sometimes use an Ideal voltage/continuity meter. I used to work for Shell oil and they required these or equivalent because of the inherent safety of not being able to have a selector in the wrong position. I have learned the value of that in the few times I have left my Flukes in current setting and hooked across 277v. Very fast way to get your attention.
Don
