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电气接地是为保证人身安全而采取的重要技术措施。在 TN-S、TN-C-S系统中,有专用的接地保护线(PE 线)可靠地接至金属配电箱外壳。如何使配线钢管与金属籀(包括配电箱、灯头箱、开关箱、插座箱等,后文不再重提)及钢管自身很好地连接。是确保配线钢管有良好的电气通路的关键问题,也是配线工程中,非带电金属部分可靠接地的技术保证。
Electrical grounding is an important technical measure taken to ensure personal safety. In the TN-S and TN-C-S systems, a dedicated grounding protection cable (PE wire) is reliably connected to the metal distribution box enclosure. How to make the distribution of steel pipe and metal 籀 (including the distribution box, lamp box, switch box, socket box, etc., will not be revisited later) and the steel pipe itself is well connected. It is a key issue to ensure a good electrical path for the distribution pipe, and also a technical guarantee for reliable grounding of uncharged metal parts in the wiring project.