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Supply to shed
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<blockquote data-quote="Davethsparky" data-source="post: 416476" data-attributes="member: 27165"><p>No, and that's not what I said. </p><p></p><p>It is not possibly to get it below 200 ohms sometimes, but what is always possible is to install a decent earth made up of multiple electrodes which achieves a good degree of stability and reliability.</p><p></p><p>what is not acceptable in my opinion is to install a single 4' rod and rely on that.</p><p></p><p></p><p></p><p></p><p>21 is the value which you can expect a DNO to quote if you enquiry about the Ze of a TT supply. Much like the 0.35 and 0.80 values which get bandied around. </p><p></p><p>Pit is important to note however that these are not maximum values, they are guidelines based on the standard 100A supply. Other size supplies will have other guideline max Ze</p></blockquote><p></p>
[QUOTE="Davethsparky, post: 416476, member: 27165"] No, and that's not what I said. It is not possibly to get it below 200 ohms sometimes, but what is always possible is to install a decent earth made up of multiple electrodes which achieves a good degree of stability and reliability. what is not acceptable in my opinion is to install a single 4' rod and rely on that. 21 is the value which you can expect a DNO to quote if you enquiry about the Ze of a TT supply. Much like the 0.35 and 0.80 values which get bandied around. Pit is important to note however that these are not maximum values, they are guidelines based on the standard 100A supply. Other size supplies will have other guideline max Ze [/QUOTE]
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