You shouldn't be asked to put down a value at all. You cannot know, even if the label says 60A or whatever. Put N/A, as you cannot legally find out. If asked the DNO will probably say 60A, as this seems to be the current fitment. Does it matter? The answer is no.

Couldn't you just write "≤100A" - we should be able to deduce that much at least (and you probably do need that much if you're relying on Annexe ZB of BS EN 61439).


(BTW an EICR isn't a certificate)


   - Andy.

You could always ask the DNO for the fuse rating, as they are legally obliged to tell you under ESQCR. (Excuse me while I stop giggling.)

I got a letter from the DNO that said (Urgent action required) we are going to change your electric meter, in order to maintain a safe and reliable electricity supply to your property.   ( We are not installing a smart meter). If the meter is fitted is stutated outside we will endeavor to change it and an appoitment is not always necessary. Anyhow they came at the appointed time, and I bounced the meter changer about this safe and reliable supply.

I took this letter the wrong way ,he said they have a program of changing all meters over 20 years old, and part of their job was to tighten the supply cables inside the cut-out as over time the copper conductors can soften and become loose, he did get a turn because I was looking , and also opened the HRC cover to check the mains fuse. So best to do a visual inspection of the cut in as with BS7671 that recommends this to be carried out.


On a different note, if you had arcing in the cut out or sometimes called a cut in would the  small rated AFDDs detect arcing downstream and trip (don't think so really) but it is going to be Hell to find the cause in the upstream circuits. Can you even use a pulsating Loop tester, or just tell another lie as with MCBs that all is well in your report without testing.


jcm

BTW an EICR isn't a certificate

Thanks AJ , but with your permission I repeat it in big bold type for the benefit of the hard of thinking "satisfactory EICR" brigade.

I normally put “NK” for not known or “NC” for not confirmed.


It can matter what the rating is, for example a 100 amp fuse does not provide overload protection for a 63 or 80 amp RCD in a consumer unit, also a 60 amp fuse may be rated at less than the maximum demand of the installation.


Andy B.

I say normally, because if it’s a 60 amp fuse holder I assume that’s what it is fused at or occasionally it will have a label on it stating the size of the fuse.


Andy B.

Thank you Chivers for asking this question. The BS7671, Requirements for electrical installations, as its name suggests has no bearing on ESQCR Distribution/Suppliers works. For some years now the guide book has tried to associate itself with the legal paper but of course any reports/certificates (EICR/EIC) can only ever be of a visual nature. If by chance you through your experience you notice exposed terminations, overheated wiring, tampering, its best to contact the local DNO who will attend as an emergency, or ask your customer to make the call. In answer to your question the term N/V (not verified) is suitable.


Regards, UKPN

NV is fine for an EICR, however correct details are required for an EIC, see 313.1(vi).

NV over here