Back in my apprentice days, we'd check for voltage with a solenoid tester, but now I see folks trusting non-contact pens for everything, even though they can miss a neutral on a shared circuit.

I had a helper last week in a 1970s split-level almost get zapped because his pen didn't beep on a dead-end hot that was still live from another leg, which is why I always verify with a meter now, so what's your go-to method for a solid voltage check?

3 comments

3 Comments

rowan_black29d ago

Read an article last week about ghost voltages tricking non-contact pens. It said they can give a false negative on a switched leg if the neutral is still live somewhere else. Saw it myself in an old apartment building, pen was silent but my meter showed 80 volts just hanging out on a wire. That's why I physically test between hot and a known ground every single time now. Those pens are just for a quick first look, not the final word.

wendy20528d ago

My buddy's pen tester missed a hot wire in his attic last year, scared the hell out of him when he grabbed it. He only trusts his meter now too.

seanlewis15d ago

Ghost voltages are like the electrical version of a bad magic trick... you think everything's safe, then zap. Those pens give a false sense of security that's honestly dangerous. I've seen guys treat them like the final answer and it makes me cringe. Always go for the meter and a real test, it's the only way to be sure. Relying on a pen alone is just asking for a shocking surprise.