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Do-It-Yourself (DIY) Question & Answer Forum
Calculating Prospective Fault Current
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<blockquote data-quote="sparkytim" data-source="post: 258467" data-attributes="member: 8627"><p>OK Tip of the day</p><p></p><p>How to test Zs on a RCD protected radial circuit.</p><p></p><p>Turn OFF RCD, short L to E at the end of line of the circuit (Furthest point from supply)</p><p></p><p>Connect one lead of your tester and connect to OUT GOING line terminal of the RCD ( RCD SWITCHED OFF)</p><p></p><p>CAREFULLY Connect the other lead to the INCOMING Line terminal and take reading.</p><p></p><p>Your Meter bypasses the RCD so it will not trip and you get a reading using the full 25 Amp test current.</p><p></p><p>Remove leads, remove short at end of line and you have it, accurate direct reading</p><p></p><p>Ps</p><p></p><p>I had to draw it out to prove to myself it would be a true reading when shown this Method.</p><p></p><p>Try it and see for yourself</p></blockquote><p></p>
[QUOTE="sparkytim, post: 258467, member: 8627"] OK Tip of the day How to test Zs on a RCD protected radial circuit. Turn OFF RCD, short L to E at the end of line of the circuit (Furthest point from supply) Connect one lead of your tester and connect to OUT GOING line terminal of the RCD ( RCD SWITCHED OFF) CAREFULLY Connect the other lead to the INCOMING Line terminal and take reading. Your Meter bypasses the RCD so it will not trip and you get a reading using the full 25 Amp test current. Remove leads, remove short at end of line and you have it, accurate direct reading Ps I had to draw it out to prove to myself it would be a true reading when shown this Method. Try it and see for yourself [/QUOTE]
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Calculating Prospective Fault Current
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