OP
NickD
Your not a real sparks till youve had a 400volt belt, all this 230volt stuffs kids play :dizzy2:
Which reg is that? :wink5:
Discuss Proving dead & safe iso on Economy 7 in the UK Electrical Forum area at ElectriciansForums.net
Your not a real sparks till youve had a 400volt belt, all this 230volt stuffs kids play :dizzy2:
Which reg is that? :wink5:
Yebbut I don't like to think thoughts like "well it's obvious" around safe isolation.
And with due respect I don't think it is that obvious because mere loss of continuity at closure doesn't prove the airgap will withstand the supply voltage. Hence my suggestion of actually IR testing rather than continuity testing. I know this may appear pedantic but I'd rather be a live pedant than an electrocuted whatever-a-smoking-corpse-that-when-alive-was-not-a-pedant-is-called.
- pulling the cutout fuse (would you do it if you were being assessed though?)
tut tut tut
1) do you carry approved seals to reseal the cut out?
2) under your risk management what do you do with the live side which you could insert a BS finger?
3) have you not read the 17th edition OSG which states that the cutout fuse is not to be removed by electricians and only by a supplier?
Now if you are really worried about the failure of the main switch carry out your usual procedure for proving its dead, you know live source, dead source, live source. Then when you are happy IR test both poles with the isolator open and closed at 500volt or 1000 volt if you really want to.
Incidentally why do you want to do this? what are you doing to the board?
If you still have problems ask a grown up to help and do remember side cutters can be sharp!:daisy:
I was testing an E7 system a few months ago and then at 3pm, just as I was finishing, the timer switched it on. Thankfully I didn't have my fingers in the board at the time. lol
Ring the DNO and wait for them to fit a isolator.
which can then be turned off
don't megger that because it will be live, unless you pull the fuse to check it
I had exactly the same thing, all packed up and noticed the neons were on on the spurs for the storage heaters, spoke to the owner and she said its a kind of boost in the afternoon, nice if her to let me know.ad I was changing the off peak board
I had exactly the same thing, all packed up and noticed the neons were on on the spurs for the storage heaters, spoke to the owner and she said its a kind of boost in the afternoon, nice if her to let me know.ad I was changing the off peak board
Thats why im packed up and gone by 2.30! :wink5:
Yes, I pull the fuse, but not illegal. SSE area. They'll give you some temporary seals and you just e-mail them to say where you've used them. Great system.Whats all this talk of pulling the fuse, nobody illegally does that.. do they? lol
Yes, I pull the fuse, but not illegal. SSE area. They'll give you some temporary seals and you just e-mail them to say where you've used them. Great system.
tut tut tut
1) do you carry approved seals to reseal the cut out?
2) under your risk management what do you do with the live side which you could insert a BS finger?
3) have you not read the 17th edition OSG which states that the cutout fuse is not to be removed by electricians and only by a supplier?
Now if you are really worried about the failure of the main switch carry out your usual procedure for proving its dead, you know live source, dead source, live source. Then when you are happy IR test both poles with the isolator open and closed at 500volt or 1000 volt if you really want to.
Incidentally why do you want to do this? what are you doing to the board?
All I can say is if you have to ask questions like this then you are NOT competent to do the job and should be given to someone who knows what theer doing.
imhotep imhotop imhotep
1) No. Seals are American. I bring the SBS.
2) Lock the meter cupboard and label across the lock ELECTRICIAN WORKING - DO NOT OPEN
3) Yes <waves 2382>, but we all know Hans Christian Andersen was the committee member responsible for that clause.
IR test @ 500Vdc both sides of switch is I think enough to keep me happy. By the way, for those who say you can't, it's live - the whole point is the supply's not live. If it was live I wouldn't need to bother.
Adding a radial circuit for a dehumidifier for my NAPIT assessment.
Side cutters can be sharp? Oh. That's where I've been going wrong then. Lovely lovely Aldi tools.
Isn't the answer to this thread - a proving unit?
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