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Do-It-Yourself (DIY) Question & Answer Forum
Long Distance Fault Finding.... Any Ideas Please?
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<blockquote data-quote="ian3012" data-source="post: 123196" data-attributes="member: 3963"><p>Right... before we start... I HAVEN'T SEEN THE JOB YET! :^O </p><p></p><p>this is a house i've worked in a lot, and i know well.. it's also 130 miles away... i'm gonna have to go there in a few weeks.... :_| </p><p></p><p>RCD tripping after a 'warm up' period.... trips after approx 10 mins, ....reset and it then trips at randomly short intervals... anything between 16 secs to a minute.</p><p></p><p>but it never trips straight away.</p><p></p><p>on the phone with customer, isolated fault down to one of the 7 lighting cct's in this house...( i put 4 of them in, but not this one)</p><p></p><p>in this lighting cct ( 6A mcb) there's 3 florrys, 1 pendant and 12 spotlights.</p><p></p><p>isolated fault further to a row of 6 spotlights which are switched seperately.</p><p></p><p>when these 6 spotlights are switched off... <strong>there is no fault</strong></p><p></p><p>told customer to remove 6 x gu10 led bulbs ...</p><p></p><p>fault is exactly the same even when the bulbs are removed. headbang </p><p></p><p>i can't blame the rcd as the other 5 cct's work fine on it....</p><p></p><p>i can't blame the mcb as there's no fault when the 6 spotlights are switched off...</p><p></p><p>i can't say it's a hard wiring short, as the tripping is never instantaneous...</p><p></p><p>can i really blame a light switch? lol.....</p><p></p><p>as i said, it seems like the cct has to 'warm up' before the rcd starts tripping..</p><p></p><p>obviously when i get there i'll do IR test and RCD ... but other than that, i just wondered if anyone else had seen anything similar to this?</p><p></p><p>or am i being a bit slow and missing the obvious?</p><p></p><p>it was rewired 7 years ago... f &amp; j 2000 (?) dis board (seems cheap and nasty, but nice neat wiring job).... tns supply... all earthing and bonding is good when i looked at it 6 months ago.</p></blockquote><p></p>
[QUOTE="ian3012, post: 123196, member: 3963"] Right... before we start... I HAVEN'T SEEN THE JOB YET! :^O this is a house i've worked in a lot, and i know well.. it's also 130 miles away... i'm gonna have to go there in a few weeks.... :_| RCD tripping after a 'warm up' period.... trips after approx 10 mins, ....reset and it then trips at randomly short intervals... anything between 16 secs to a minute. but it never trips straight away. on the phone with customer, isolated fault down to one of the 7 lighting cct's in this house...( i put 4 of them in, but not this one) in this lighting cct ( 6A mcb) there's 3 florrys, 1 pendant and 12 spotlights. isolated fault further to a row of 6 spotlights which are switched seperately. when these 6 spotlights are switched off... [B]there is no fault[/B] told customer to remove 6 x gu10 led bulbs ... fault is exactly the same even when the bulbs are removed. headbang i can't blame the rcd as the other 5 cct's work fine on it.... i can't blame the mcb as there's no fault when the 6 spotlights are switched off... i can't say it's a hard wiring short, as the tripping is never instantaneous... can i really blame a light switch? lol..... as i said, it seems like the cct has to 'warm up' before the rcd starts tripping.. obviously when i get there i'll do IR test and RCD ... but other than that, i just wondered if anyone else had seen anything similar to this? or am i being a bit slow and missing the obvious? it was rewired 7 years ago... f & j 2000 (?) dis board (seems cheap and nasty, but nice neat wiring job).... tns supply... all earthing and bonding is good when i looked at it 6 months ago. [/QUOTE]
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