전체 글93 Maximum Resistance to ground(ohm) What is the maximum allowable resistance to ground (ohms) for a single grounding electrode without the need to add an additional grounding electrode according to the NEC? ARTICLE 250 - GROUNDING AND BONDING 250.53 Grounding Electrode System Installation. (2) Supplemental Electrode Required. The supplemental electrode shall be permitted to be bonded to one of the following:(1) Rod, pipe, or pla.. 2024. 2. 17. 이전 1 ··· 21 22 23 24 다음 반응형