At present, the acceptance of the new building is 4 102A and MI2 124.

The test point is the disconnection card of the down conductor inside the corner of the building (usually there)

Taking the second phase project of Hexi Relief in Xihu District, Benxi, Liaoning Province as an example, the method of testing grounding grid with 3-5 times diagonal is adopted.

Grounding resistance varies from 0.8 Ω to 2.4 Ω (due to too many buildings, too large area, backfill soil and rocks).

10.8 Ω for 5 # building, 0.84 Ω for 3# building and/0/0 Ω for 9# building.