That $30 outlet tester almost got me fired last Tuesday

I was roughing in a 200 amp panel on a new build in Austin and used one of those plug-in tester to double check my work. Thing said everything was good, so I moved on. Next day the GC's inspector flagged it for a bootleg ground and I had to rip out half the circuits. Has anyone else had one of those cheap testers lie to them or was I just unlucky?

4 comments

4 Comments

anna4911mo ago

Ngl the real issue nobody talks about is that those testers can't tell the difference between a good ground and a bootleg ground at all. They just check for voltage between hot and ground, but if someone tied the ground to the neutral upstream, the tester will light up happy as can be. I've seen houses where the electrician literally just jumped the neutral to the ground screw inside the panel and every single outlet tested fine with the plug tester. Your situation sounds like the inspector knew what to look for and actually opened up the panel to verify, which most of those cheap testers will never catch. That's the kind of thing that bites you the next day when someone with a real meter shows up.

murray.cora1mo ago

And honestly the thing nobody brings up is that these testers can trick you into thinking you're done when you're not even close. I've had a Fluke meter show me a bootleg ground that a Klein tester said was fine, and that's a $50 difference in price right there. People assume if the lights come on in the right pattern the job is good, but that's like checking if your car starts and calling it a full inspection. The real trap is the confidence they give you - you stop verifying because the little green light says you're golden.

viola_lopez301mo ago

Buddy of mine used one on a bathroom rewire and it passed everything, next day the homeowner's hair dryer kept tripping the breaker because the neutral was sharing two circuits. Should've gone with a meter like he usually does.

emeryj661mo ago

Wait, so he tested it with one of those all-in-one testers and it said everything was good? That's honestly wild to me, I've seen those things miss stuff like backfed neutrals before but never a straight up shared neutral. How does a simple plug tester not catch that, doesn't it check for open neutrals? Makes me wonder if he was using the cheap $15 model or the slightly better one, because I've heard the knockoffs are basically useless in real world conditions. That homeowner must have been pretty annoyed finding out the hard way the next morning.