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Do-It-Yourself (DIY) Question & Answer Forum
Calculating Prospective Fault Current
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<blockquote data-quote="stev999" data-source="post: 258179" data-attributes="member: 17980"><p>Hi everyone. I have just received a Newlec NL111 loop impedance tester, it is quite old but its useful for me to learn with. It doesn't have a d lock so it does trip RCDs, so to get Ze i have to disconnect main earth with the board isolated &amp; test between this and incoming live phase. What i need to know is can the prospective fault current be calculated from Ze. I notice on test sheets your required to note down the PFC, but not short circuit or earth fault current, although its a requirement of BS7671 Reg 612.11. Basically does this mean this tester isn't suitable for modern requirements. Any advice would be greatly appreciated.</p></blockquote><p></p>
[QUOTE="stev999, post: 258179, member: 17980"] Hi everyone. I have just received a Newlec NL111 loop impedance tester, it is quite old but its useful for me to learn with. It doesn't have a d lock so it does trip RCDs, so to get Ze i have to disconnect main earth with the board isolated & test between this and incoming live phase. What i need to know is can the prospective fault current be calculated from Ze. I notice on test sheets your required to note down the PFC, but not short circuit or earth fault current, although its a requirement of BS7671 Reg 612.11. Basically does this mean this tester isn't suitable for modern requirements. Any advice would be greatly appreciated. [/QUOTE]
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Calculating Prospective Fault Current
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