| 1. | An extraneous conductive part means a conductive part liable to introduce a potential , generally an earth potential , that does not form part of an electrical installation
一般统称水线的导体其实有三种，包括电路保护导体、总等电位接驳导体及辅助等电位接驳导体。 |
| 2. | We hope that , after this discussion , you would be more familiar with the determination of extraneous conductive parts and their bonding connection requirements during your design and maintenance work
希望以上的简介能解释大家对非电气装置金属部分及其等电位接驳方法及要求的疑惑。 |
| 3. | Based on the previous explanation , we could understand why a metallic door handle is usually not considered as an extraneous conductive part . if a proper installation method is used , the metallic accessories in bathroom could become non - extraneous conductive parts
至于浴室内的金属挂架，若安装方法得宜(譬如装有绝缘垫) ，便有足够的对地抗阻，变成不是非电气装置金属部分。 |
| 4. | Regarding the metallic windows , due to their exposure to external environment where rain and high humid conditions are prevalent , they are usually considered as extraneous conductive parts . the bonding connection method for extraneous conductive parts is specified in code 11 of the cop
至于一般的金属窗框，因受安装方法及外界环境等不明朗因素（如雨水及潮湿）所影响，一般都会被视为非电气装置金属部分。 |
| 5. | Typical examples are water mains and gas pipes . equipotential bonding consists of main and supplementary equipotential bondings . it means the electrical connection linking various exposed conductive parts and extraneous conductive parts so as to achieve a substantially equal potential
至于等电位导体的作用，其实就是将各个外露非带电金属部分和非电气装置金属部分作电气性连接，使各部分的电位在颇大程度上相等。 |
| 6. | Designers and registered electrical workers may be uncertain whether conductive parts such as metallic bathroom accessories , metallic windows or metallic door handles are extraneous conductive parts . when difficulties are encountered , you may carry out a measurement as illustrated in figures 4 and 5 . in figure 4 , a is an exposed conductive part with a resistance rcpc to main earthing terminal
附图四载列外露非带电金属部分a及怀疑为非电气装置金属部分b (例如是金属水喉管或木门的金属手柄) ， a对总接地终端的阻抗为rcpc ， b对地的阻抗为rx 。 |
| 7. | Figure 1 illustrates the connection arrangement of circuit protective conductors ( cpc ) and bonding conductors to exposed and extraneous conductive parts . by proper installation of automatic disconnection devices , cpc and equipotential bonding , in case of an earth fault occurred in an installation , the voltage on any exposedextraneous conductive parts occurring anywhere in the installation should be of such magnitude and duration as not to cause danger ( please refer to figure 2 and 3 )
因此，当电力装置发生故障时，由于线路得到相关截流器的保护，电力装置的任何一处的外露非带电金属部分和非电气装置金属部分的电压，其强度及持续时间皆不致引起危险(请参阅附图二及三) 。 |
| 8. | Verification of extraneous conductive parts in response to trade enquiries , we take this opportunity to explain one of the determination methods for extraneous conductive parts and their bonding requirements as specified in the code of practice for the electricity ( wiring ) regulations ( cop ) . the provision of equipotential bonding can effectively reduce the risk of electric shock arising from faulty electrical installations
本署收到多宗业界关于确定非电气装置金属部分及其等电位接驳的查询，我们希望藉著今次通讯，向大家讲解测定非电气装置金属部分的一种方法及其在《电力(线路)规例工作守则》 (下称工作守则)中的等电位接驳要求。 |
| 9. | Failure to ensure that the extraneous conductive parts were effectively connected to the main earthing terminal of the fixed electrical installation , under the condition that the former and any adjacent earthed metal work of electrical equipment were simultaneously accessible , in contravention of regulation 11 ( 4 ) of the electricity ( wiring ) regulations
未能确保将非电气装置金属部分有效地与固定电力装置的总接地终端连接，而邻近电力器具的已接地金属部份与该非电气装置金属部分可同时被触摸，违反了《电力(线路)规例》第11 ( 4 )条的规定。 |
