Discuss Am I missing something here in the UK Electrical Forum area at ElectriciansForums.net
E54, yes I know I should of done, Richard thanks for your input, I know the armour is not used as an earth, it has a separate earth, just can't see how there is a problem still and its not showing up
Crickey, really?Ok I get called to a job where there is no power to the flat. Intake is in a small basement cupboard, 25mm swa protected by a Bs88 80a fuse in a switch fuse. Test for continuity and the fuse has blown. Fit a new one and I'm sure you can guess the outcome..... New fuse blows.
Go up the the tenants cu and ir at 250v the incoming swa tails, live to neutral, live to earth etc and get a reading of around 150mohms on each. Now This job was last thing tonight and my brain is frazzled, what am I missing, the cu is a 16th edition skeleton board, around 15 years old, no one else is affected in the flats, oh and the new fuse blew with the main switch off
Agreed a spot of testing wouldn't of gone amiss, but I was parked in the road in a permit area and had one eye out for the traffic warden, the cu main switch was off darkwood,surely insolation resistance of the tails from the main switch back would of found an issue
There is nothing in this life that happens without a reason,metaphysical discussions apart...unless your my 6 year old,in which case,it genuinely,"...just happened..." :smilewinkgrin:Fuses don't blow without reason, short circuit, or over load current.
yep....You can blow a fault clear. But it’s usually due to damp. The heat of the flashover dries the fault out.
I spent nearly a month looking a UG cable fault. Every time the fuses blew it would test perfect afterwards. Finally found it by putting copper links in place of the 450A fuses. The ground erupted and a tree fell over, gave the game away really. The tree roots had disturbed a through joint and damp was getting in.
Fuses don't blow without reason, short circuit, or over load current.
so..Ok I get called to a job where there is no power to the flat. Intake is in a small basement cupboard, 25mm swa protected by a Bs88 80a fuse in a switch fuse. Test for continuity and the fuse has blown. Fit a new one and I'm sure you can guess the outcome..... New fuse blows.
Go up the the tenants cu and ir at 250v the incoming swa tails, live to neutral, live to earth etc and get a reading of around 150mohms on each. Now This job was last thing tonight and my brain is frazzled, what am I missing, the cu is a 16th edition skeleton board, around 15 years old, no one else is affected in the flats, oh and the new fuse blew with the main switch off
Sorry I offended you, I meant well, I do feel a qualified electrician could get to the bottom of the problem with the correct test equipment quite quickly and cheeply, sorry again.Would like to thank everyone who has responded to this post in a helpful manner, I'm on this forum a lot and don't often post answers as I'm afraid of putting up incorrect information, I suppose a lack of confidence.
E54 especially I would like to thank for drawing my attention to a couple of things I hadn't thought of. we are all human and make mistakes and sometimes cut corners, it's not right, just saying. I would not like to thank mdj, I thought post 26 was unnecessary, ****ty and superior. If you can't post anything helpful then don't. Rant over, tin hat on. Thanks guys
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