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EICR Certification DNO Fuse

Chivers
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.
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    So on the basis you cannot write down anything you have not checked so it has to be a LIM or N/V.

    So how can you verify disconnection time for ADS on the supply side of your steel clad CU? Or say that the PFC that's a little over the breaking capacity of the MCBs is adequate? Or will many EICR have to have an FI on those points - and thus be unsatisfactory?


    Is it not a reasonable assumption that the fuse type matches the carrier and it's rating won't exceed the carrier's rating (typically marked as 100A) - often that would provide sufficient information to answer the above points.


       - Andy.
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  • 0
    So on the basis you cannot write down anything you have not checked so it has to be a LIM or N/V.

    So how can you verify disconnection time for ADS on the supply side of your steel clad CU? Or say that the PFC that's a little over the breaking capacity of the MCBs is adequate? Or will many EICR have to have an FI on those points - and thus be unsatisfactory?


    Is it not a reasonable assumption that the fuse type matches the carrier and it's rating won't exceed the carrier's rating (typically marked as 100A) - often that would provide sufficient information to answer the above points.


       - Andy.
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