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Do-It-Yourself (DIY) Question & Answer Forum
Low IR reading on ring main
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<blockquote data-quote="Robin Spark" data-source="post: 86545" data-attributes="member: 5444"><p>1. Cant see how leaving items connected is going to make much difference unless those items are faulty or/are inherent to leaking current to earth ie appliances with heating elements in them.</p><p></p><p>2. How old was the ring main? If it looked fairly new then I would probably investigate. Monkey, is this a domestic property?</p><p></p><p>3. Was it unreasonable to ensure all items were disconnected because I think really the guidance is to do L/N to E where it would not really be practicable to do the normal tests ie lighting ccts with loads of trannies.</p><p></p><p>4. What work did you carry out or was this a pre-check test before commencent or a PIR maybe.</p><p></p><p>5. I can see your concern with 3.65Mohms, however your not going to have any prolems with the RCD as leakage is approx 0.00006ohms at that IR test value.</p></blockquote><p></p>
[QUOTE="Robin Spark, post: 86545, member: 5444"] 1. Cant see how leaving items connected is going to make much difference unless those items are faulty or/are inherent to leaking current to earth ie appliances with heating elements in them. 2. How old was the ring main? If it looked fairly new then I would probably investigate. Monkey, is this a domestic property? 3. Was it unreasonable to ensure all items were disconnected because I think really the guidance is to do L/N to E where it would not really be practicable to do the normal tests ie lighting ccts with loads of trannies. 4. What work did you carry out or was this a pre-check test before commencent or a PIR maybe. 5. I can see your concern with 3.65Mohms, however your not going to have any prolems with the RCD as leakage is approx 0.00006ohms at that IR test value. [/QUOTE]
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Low IR reading on ring main
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