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Do-It-Yourself (DIY) Question & Answer Forum
TT to TNC-S
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<blockquote data-quote="steptoe" data-source="post: 11620" data-attributes="member: 7"><p>I'll have a look in a bit ADMIN</p><p></p><p>in short,</p><p></p><p>a proper TN-C-S requires to be earthed(spiked) in numerous places throughout its length,</p><p></p><p>hence - protective MULTIPLE earth</p><p></p><p>also as has been said earth faults picked up from neighbouring properties can find a back feed up your (lone) spike just outside your house, or through your watermain etc.</p><p></p><p>BUT,</p><p></p><p>I hear you cry, wont TT pick up the same faults?</p><p></p><p>in short, very unlikely, due to the higher impedance to earth, the fault will take the easiest path,(brings us back to the exporting PME supplies).</p><p></p><p>I'll try find some examples for you.</p></blockquote><p></p>
[QUOTE="steptoe, post: 11620, member: 7"] I'll have a look in a bit ADMIN in short, a proper TN-C-S requires to be earthed(spiked) in numerous places throughout its length, hence - protective MULTIPLE earth also as has been said earth faults picked up from neighbouring properties can find a back feed up your (lone) spike just outside your house, or through your watermain etc. BUT, I hear you cry, wont TT pick up the same faults? in short, very unlikely, due to the higher impedance to earth, the fault will take the easiest path,(brings us back to the exporting PME supplies). I'll try find some examples for you. [/QUOTE]
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TT to TNC-S
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