使用金属水管作为建筑物电气接地系统的一部分已被禁止 这是80多年来的常见做法。当变压器服务于多个 建筑物、供水系统和分配管道可以充当平行的中性回流路径 从建筑电气系统到变压器的杂散电流。电路中的电阻 管道连接（如果存在）会迫使一部分杂散电流流过管道 平行水路。管道内部的电流放电会增加金属释放。 之前关于接地对水质和金属释放的影响的研究没有进行 调查电阻或电介质安装的影响。这项研究调查了 关于水质的电介质配件。用插入式软管对铜管进行了改进 电介质配件充满了 来自两个不同地方的饮用水 对水源和水源进行了测试 外加交流电（AC） 高达123 V的电压，持续一段时间 高达110小时。显著增加 铜、铅和锌 饮用水的计量单位较少 在~50的外加电压下24小时以上 真空吸尘器。金属释放量普遍增加 通过电荷转移，在 根据法拉第定律。 包括13个参考文献、表格、图表。

The use of metallic water piping as part of a building's electrical grounding system has been a commonplace practice for more than 80 years. When electrical transformers serve multiple buildings, the water services and distribution piping can act as parallel neutral return paths for stray current from building electrical systems to the transformers. Electrical resistance in pipe connections, if present, forces some fraction of the stray current to flow through the parallel water path. Discharge of current on the inside of the pipe increases metal release. Previous studies on the effects of grounding on water quality and metal release did not investigate the effects of resistance or dielectric fitting. This study investigated the effects of dielectric fittings on water quality. Copper tubing that had been modified with inserted dielectric fittings was filled with potable water from two different water sources and was tested with applied alternating current (AC) voltages of up to 123 V for periods of up to 110 h. Significant increases in copper, lead, and zinc in stagnant potable water were measured in less than 24 h at applied voltages of ~50 VAC. Metal release generally increased with charge transfer, in accordance with Faraday's law. Includes 13 references, tables, figures.