Yes they do work i have one from consumer electric and klien tools i usebis just to make sure there is nopower running after i cut power to a unit.. for more indepth testing you need a full on meter
You can get zapped hard by a stray leg of power with a non contact voltage tester not giving an accurate answer if it’s love trust me I got hit and used a fluke so now i double check with a good meter always
Like you said , good home owners meter . Christmas time battery checker . The non contract checker so so .
Yes they do work i have one from consumer electric and klien tools i usebis just to make sure there is nopower running after i cut power to a unit.. for more indepth testing you need a full on meter
You can get zapped hard by a stray leg of power with a non contact voltage tester not giving an accurate answer if it’s love trust me I got hit and used a fluke so now i double check with a good meter always