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Electrical Inspection & Testing Forum
Testing Ze on Separate earth rod
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<blockquote data-quote="DonClif" data-source="post: 556222" data-attributes="member: 36659"><p>Hi lads,</p><p></p><p>We turned down a job today that has got me thinking.</p><p>Customer wanted a new single socket for a hot tub, we wanted to take a spur from the interior ring, into a rotary isolator, then into a single socket for the tub.</p><p>Pic attached.</p><p></p><p>Earthing is currently PME, so I wanted to add an earth rod for the new bits outside.</p><p>But the question is, hoe do you test Ze/Zs with the earthing so far away from the origin of the installation?</p><p>Could I just Zs at the end of the circuit?</p><p>Wander lead from the rod to the main board? </p><p></p><p>Am I even close?</p><p></p><p>I have a good understanding of testing but I has little experience with TT and earth rods, and I'd rather ask a silly question here than make a silly mistake later.</p></blockquote><p></p>
[QUOTE="DonClif, post: 556222, member: 36659"] Hi lads, We turned down a job today that has got me thinking. Customer wanted a new single socket for a hot tub, we wanted to take a spur from the interior ring, into a rotary isolator, then into a single socket for the tub. Pic attached. Earthing is currently PME, so I wanted to add an earth rod for the new bits outside. But the question is, hoe do you test Ze/Zs with the earthing so far away from the origin of the installation? Could I just Zs at the end of the circuit? Wander lead from the rod to the main board? Am I even close? I have a good understanding of testing but I has little experience with TT and earth rods, and I'd rather ask a silly question here than make a silly mistake later. [/QUOTE]
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Testing Ze on Separate earth rod
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