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Low IR reading on ring main
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<blockquote data-quote="monkey5" data-source="post: 86586" data-attributes="member: 1819"><p>[quote name=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><strong>the ring main is approx 9 years old, and its a domestic</strong></p><p></p><p>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><span style="font-size: 18px"><strong>not really, just trying to save a little time, like i said it was the first time ive done it this way and was hoping for a better result, then got worried when it was so low. but might just go back to the way i normally do it</strong></span></p><p></p><p>What work did you carry out or was this a pre-check test before commencent or a PIR maybe.</p><p></p><p><span style="font-size: 18px"><strong>i had added a couple of outside lights from sw/fcu in lounge, all work fine and no rcd tripping </strong></span></p><p></p><p>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><p></p><p><span style="font-size: 18px"><strong>circuit was rcd protected before and no trips, i just got abit worried when i got such a low reading, even tho its a pass</strong></span><strong>. .</strong></p><p></p><p><strong>how do you work out the leakage just out of curiosity?</strong></p><p></p><p><strong> thanks for reply</strong></p></blockquote><p></p>
[QUOTE="monkey5, post: 86586, member: 1819"] [quote name=How old was the ring main? If it looked fairly new then I would probably investigate. Monkey, is this a domestic property? [B]the ring main is approx 9 years old, and its a domestic[/B] 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. [SIZE=18px][B]not really, just trying to save a little time, like i said it was the first time ive done it this way and was hoping for a better result, then got worried when it was so low. but might just go back to the way i normally do it[/B][/SIZE] What work did you carry out or was this a pre-check test before commencent or a PIR maybe. [SIZE=18px][B]i had added a couple of outside lights from sw/fcu in lounge, all work fine and no rcd tripping [/B][/SIZE] 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 [SIZE=18px][B]circuit was rcd protected before and no trips, i just got abit worried when i got such a low reading, even tho its a pass[/B][/SIZE][B]. .[/B] [B]how do you work out the leakage just out of curiosity?[/B] [B] thanks for reply[/B] [/QUOTE]
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