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Do-It-Yourself (DIY) Question & Answer Forum
earthing an outbuilding on main tt system supply
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<blockquote data-quote="kme" data-source="post: 6251" data-attributes="member: 113"><p>OK</p><p></p><p>Let me jump in here please. I love a good discussion.</p><p></p><p>The fact that you have a TT at the house; and you`re putting TT at the outbuilding means that you have effectively a (relatively) high impedance earth connection. Twice.</p><p></p><p>It would, IMHO, make sense to connect the swa armour at BOTH ends.</p><p></p><p>You do not have any issues with high current flow, as the rod impedance is sufficiently high. Hoowever, you have provided a parallel path, at approx the same resistance as the original. Therefore, you`ve halved the ground impedance; creating a better earth path. You are not going to induce a PD between different points in your earth path ( of more than negligable value), so where`s the problem?</p><p></p><p>Steptoe isn`t winding you up m8. It simply isn`t a problem. Earth it both ends.</p><p></p><p>KME</p></blockquote><p></p>
[QUOTE="kme, post: 6251, member: 113"] OK Let me jump in here please. I love a good discussion. The fact that you have a TT at the house; and you`re putting TT at the outbuilding means that you have effectively a (relatively) high impedance earth connection. Twice. It would, IMHO, make sense to connect the swa armour at BOTH ends. You do not have any issues with high current flow, as the rod impedance is sufficiently high. Hoowever, you have provided a parallel path, at approx the same resistance as the original. Therefore, you`ve halved the ground impedance; creating a better earth path. You are not going to induce a PD between different points in your earth path ( of more than negligable value), so where`s the problem? Steptoe isn`t winding you up m8. It simply isn`t a problem. Earth it both ends. KME [/QUOTE]
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earthing an outbuilding on main tt system supply
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