Found out I was grounding through EMT threads wrong for 10 years

Tbh I was on a job last week swapping out an old panel in a warehouse outside Columbus and this kid fresh out of trade school watched me tighten a locknut. He goes "you know you have to scrape the paint off the box threads for a solid ground path right?" I thought he was messing with me but he pulled a file out of his bag and showed me. I have literally never done that in a decade of service work. I always just cranked it tight and assumed the threads cut through. We tested a few of my old installs with a meter and sure enough some had resistance. Now I feel like an idiot but hey I learned something instead of burning down a building.

2 comments

2 Comments

anthonykim13d ago

Ha, yeah nothing like a trade school kid making you question a decade of habits. At least you didn't burn anything down, that's a win in my book.

charles_kim12d ago

@anthonykim right? Watching some 22 year old do the same thing in half the time with no sweat is humbling... pretty sure my back's filing a formal complaint after today.