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Exported earth
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<blockquote data-quote="kme" data-source="post: 4693" data-attributes="member: 113"><p>LOOK IN THE REGS BOOKS AND GUIDES AND SEE HOW MANY GRAPHS AND CHARTS CONSIDER THE MCB BREAKING AMPS</p><p></p><p><em>I`m sorry - relevance to this scenario is?</em></p><p></p><p>NO THIS WILL BE THE CURRENT THE CONDITIONS WILL BE TRYING TO ACHIEVE...A CAR CANNOT GO FROM OMPH TO 100MPH AS IF IN A TIME WARP OR SOMETHING, IT WILL NEED TO ACCELERATE UP TO THAT SPEED, THE SAME PRINCIPLE HOLDS WITH THE FAULT CURRENT.</p><p></p><p><em>Maybe my explaination was at fault. I`m not talking about the instant that the fault occurs. A few milliseconds after will be fine.</em></p><p></p><p>so we now have our two parallel resistances.</p><p></p><p>WHERE? <em>Cable sheath &amp; TT rod</em></p><p></p><p>n.b. BOTH have Uo across them.</p><p></p><p>HOW DO THEY? <em>Because there is a fault to earth of negligable impedance.</em></p><p></p><p>THE ONLY WAY 230V WOULD BE AT BOTH POINTS WOULD BE IF THERE WAS NO CURRENT FLOWING ...IE THE MET DISCONNECTED FROM EARTH</p><p></p><p><em>Sorry m8 - daft comment.</em></p><p></p><p>I think we are probably going to have to "agree to disagree" on this; unless SL`s in-depth &amp; excellent posts have helped you understand.</p><p></p><p>SL - full marks on that. have that other scooby snack now m8<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite8" alt=":D" title="Big grin :D" loading="lazy" data-shortname=":D" /></p></blockquote><p></p>
[QUOTE="kme, post: 4693, member: 113"] LOOK IN THE REGS BOOKS AND GUIDES AND SEE HOW MANY GRAPHS AND CHARTS CONSIDER THE MCB BREAKING AMPS [I]I`m sorry - relevance to this scenario is?[/I] NO THIS WILL BE THE CURRENT THE CONDITIONS WILL BE TRYING TO ACHIEVE...A CAR CANNOT GO FROM OMPH TO 100MPH AS IF IN A TIME WARP OR SOMETHING, IT WILL NEED TO ACCELERATE UP TO THAT SPEED, THE SAME PRINCIPLE HOLDS WITH THE FAULT CURRENT. [I]Maybe my explaination was at fault. I`m not talking about the instant that the fault occurs. A few milliseconds after will be fine.[/I] so we now have our two parallel resistances. WHERE? [I]Cable sheath & TT rod[/I] n.b. BOTH have Uo across them. HOW DO THEY? [I]Because there is a fault to earth of negligable impedance.[/I] THE ONLY WAY 230V WOULD BE AT BOTH POINTS WOULD BE IF THERE WAS NO CURRENT FLOWING ...IE THE MET DISCONNECTED FROM EARTH [I]Sorry m8 - daft comment.[/I] I think we are probably going to have to "agree to disagree" on this; unless SL`s in-depth & excellent posts have helped you understand. SL - full marks on that. have that other scooby snack now m8:D [/QUOTE]
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