GB 50057-2010 第4.3.5条
| **** | **Protection against step voltage and touch voltage**: In areas with frequent guest activity (e.g., entrances, poolside), where the grounding device is less than 3 m from building entrances/exits or walkways, potential equalization measures shall be taken (e.g., laying asphalt pavement or using grid-type grounding electrodes) to keep touch voltage and step voltage below 50 V. |