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Electrician Talk Forum
Wooden Shed and how to proceed TT or not
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<blockquote data-quote="GD16" data-source="post: 515149" data-attributes="member: 33818"><p>I thought the key issue is that what ever earthing system is used if there is not a separate earth connection wire run all the way back by the DNO to their substation transformer you run the risk of lost neutral causing extraneous parts to rise to line voltage or close to it. Any bonded water/gas pipes may end up transferring any earth fault currents to earth in this situation but obviously this must not be relied upon<img class="smilie smilie--emoji" loading="lazy" alt="😬" title="Grimacing face :grimacing:" src="https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f62c.png" data-shortname=":grimacing:" />.</p><p></p><p>Its just a case of the current taking path of least resistance <img class="smilie smilie--emoji" loading="lazy" alt="🙂" title="Slightly smiling face :slight_smile:" src="https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f642.png" data-shortname=":slight_smile:" /></p><p></p><p>Thanks for all your help.</p></blockquote><p></p>
[QUOTE="GD16, post: 515149, member: 33818"] I thought the key issue is that what ever earthing system is used if there is not a separate earth connection wire run all the way back by the DNO to their substation transformer you run the risk of lost neutral causing extraneous parts to rise to line voltage or close to it. Any bonded water/gas pipes may end up transferring any earth fault currents to earth in this situation but obviously this must not be relied upon😬. Its just a case of the current taking path of least resistance 🙂 Thanks for all your help. [/QUOTE]
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Wooden Shed and how to proceed TT or not
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