콘크리트 바닥에 구멍 뚫어 접지봉 단 하나로 접지값 잡아내는 방법을 보여 드립니다

This video demonstrates drilling a hole in a concrete floor to obtain a grounding value that meets the standards. Only a single grounding rod is used. Here is the purchase link for the grounding resistance reducer. https://link.coupang.com/a/dO6eNSTpMy "This post is part of the Coupang Partners program, and I receive a commission for it."