You turn the circuit off and check for continuity between red & black.... not voltage:O:Ohii have been given a draper vT1 two probe voltage tester, how do you use them to find the live black wire from the other two neutral black wires? and are they safe to use?
If you don't have a continuity meter you could measure voltage!You turn the circuit off and check for continuity between red & black.... not voltage:O:OWhen the switch is open you get no continuity
When the switch is closed you get continuity
Then mark the switched live with some Red or Brown sleeving before you forget which one it is
If you don't have a continuity meter you shouldn't be doing this kind of testing...If you don't have a continuity meter you could measure voltage!Carefully!
I have a Fluke T50 with a continuity function. I sometimes use it to verify that the circuit is off before I do anything.many better quality testers like this can test continuity along with voltage.and you should have marked the black wire before the light was removed
I usually use one of theseSometimes use it? it should always be used to make sure something is dead before you play with it!
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