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EICR Certification DNO Fuse

What are peoples thoughts on completing Certificates with regards to DNO fuses.

When you complete a Certificate Technically you do not remove the DNO Cut out fuse so you do not know 100% what the Fuse size is so would you personally put the fuse down as a 1362 type 2 and note down the rating advised by the Supplier or put this down as a Limitation? Up to this week I had normally put the rating as Written on the Fuse carrier by the DNO so 100A = 100A , 80a = 80a etc... I test the ZE/ZS at the closest place to the Suppliers cut out & note this down as the EFLI.

A colleague of mine has recently been "critical" of this stating we should be putting it down as a limitation as we can not guarantee the fuse is exactly what it says on the carrier.

0 AncientMariner over 4 years ago

Paperclips certainly must have a BS fuse rating since A COUPLE OF YEARS AGO I found one in parallel with an open circuit 60A fuse in a SEALED cutout. (The meter was being changed and the fuse carrier was already out and I asked the meter fitter what fuse was fitted.) He fitted a 63A fuse before he left.

Going by the discolouration of the paperclip, there must have been some high power loads at some time following the "upgrade". http://ancient-mariner.co.uk/public/IMG_1024.JPG

Clive
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0 Sparkingchip over 4 years ago

Now you have confused things, how many people would have a guess at the fuse rating being 63 amps?
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0 ebee over 4 years ago

I think that 60A fuses and 63A paperclips were pretty much interchangeable for a while as were the 80A or 100A fuses and 4" or 6" nails
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0 Johno12345 over 4 years ago

AncientMariner:

Paperclips certainly must have a BS fuse rating since A COUPLE OF YEARS AGO I found one in parallel with an open circuit 60A fuse in a SEALED cutout. (The meter was being changed and the fuse carrier was already out and I asked the meter fitter what fuse was fitted.) He fitted a 63A fuse before he left.

Going by the discolouration of the paperclip, there must have been some high power loads at some time following the "upgrade". http://ancient-mariner.co.uk/public/IMG_1024.JPG

Clive

that was our on-site electricians trick, bits of armouring wedged in behind a blown fuse, carefully done so it couldn't be seen without taking the fuse out, right up to 630a fuses were found like that
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0 MHRestorations over 4 years ago

We almost always do a LIM. On some jobs we have a meter fitter around (usually big rewires). On those I ask him or her for a quick glance at the removed fuse. Of course i'd never remove the fuse myself, even if there was no seal present ?
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0 ebee over 4 years ago

A nod`s as good s a wink to a blind bat! ?
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EICR Certification DNO Fuse

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