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<blockquote data-quote="Cislug" data-source="post: 74478" data-attributes="member: 5604"><p>It would appear to work unfortunately I d'ont have a 750VA test transformer, the place used to be a Guest House it's had a number of structural alterations in the past and the electrical work would appear to have been DIY. The present owner say's it's tripped off a couple of times, the main earth is connected to the water main which is a code 1 now but was common practice back in the 50/60's it's impressively low at 26.8ohm's though I dowt if I'l get it as low with an electrode even an 8 footer. Anyway I just need to complete the Schedule so if anyone has a copy of the 14th Ed (I think thats the one) it may have some info re: Max Zs value for circuits part of a TT system protected by one of these dinosaurs, not to be confused with the max electrode resistance of 200ohms.</p><p></p><p>Cheers</p><p></p><p>200ohms for the electrode</p></blockquote><p></p>
[QUOTE="Cislug, post: 74478, member: 5604"] It would appear to work unfortunately I d'ont have a 750VA test transformer, the place used to be a Guest House it's had a number of structural alterations in the past and the electrical work would appear to have been DIY. The present owner say's it's tripped off a couple of times, the main earth is connected to the water main which is a code 1 now but was common practice back in the 50/60's it's impressively low at 26.8ohm's though I dowt if I'l get it as low with an electrode even an 8 footer. Anyway I just need to complete the Schedule so if anyone has a copy of the 14th Ed (I think thats the one) it may have some info re: Max Zs value for circuits part of a TT system protected by one of these dinosaurs, not to be confused with the max electrode resistance of 200ohms. Cheers 200ohms for the electrode [/QUOTE]
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