GB 50057-2010 第6.3.5条
| Equipotential bonding for the swimming pool and SPA area (if any) within the hotel: all metal components (such as metal ladders, metal luminaire enclosures, metal pipes, metal grilles) shall be connected to the equipotential bonding bar, with a connecting conductor cross-sectional area of not less than 16 mm² copper. The grounding resistance of the equipotential bonding bar in this area shall not exceed 1 Ω.