GB 50311-2016 第7.0.3条
| **** | Grounding of shielded cabling systems should use single-point grounding. When two or more grounding electrodes exist, the ground potential difference between them should not exceed 1 Vr.m.s. Equipotential grounding terminal boards should be installed in the weak-current (low-voltage) rooms on each floor of the hotel building. |