1, and the independent lightning protection grounding resistance shall be less than or equal to 10 ohm;

2, independent safety protection grounding resistance should be less than or equal to 4 ohms;

3. Independent AC working grounding resistance should be less than or equal to 4 ohms;

4. The working grounding resistance of the independent DC should be less than or equal to 4 ohms;

5. Anti-static grounding resistance generally requires less than or equal to100Ω?

6. The grounding resistance between * * * and the grounding body (common grounding) shall be no greater than 1.