Surge protection devices without overcurrent protection

Hello all, greetings from a desk day.

I am just off the phone with our genius SPD lady at SPD.  I mentioned the latest Fusebox distribution board which does not have an overcurrent device for the SPD.  The device is a Fusebox SPD1MT2 type 2 direct to busbar surge protection device.   She tells me that it is not compliant in accordance with section 524.4.5 and am inclined to agree.

www.fusebox.shop/.../spd1mt2

So, I installed one a week or so ago.  Purchased in good faith, and guilty of assuming an overcurrent device would be there,   I was a touch surprised when I saw no MCB for the SPD.

Their website states product description states 'with No MCB required'. 

I'm reading now that overcurrent can (in italics) be built into the device but my conversation with SPD hinted at some industry 'naughtiness'.  

Any views? Where do we stand with that then, in terms of compliance as installers?

thank you, 

Zs

Parents
  • Given all the money that's paid to various organisations it wouldn't be that hard or expensive to test some of these devices until they fail and see what happens. Or maybe even a company like surge devices could test one or more of the busbar mounted devices to destruction and see what happens. They don't have to name products, but would be great to see claimed risks backed up with real evidence.

    We are all guessing, there are companies out there with the right test kit to do it, I am fairly sure the likes of David Savery would struggle to fund a suitable test, but maybe someone would like to loan David or John Ward the facilities to run theses tests. I am sure either of them would love to have a play and would be completely neutral.

    Or thinking about it. The question is how do they fail when carrying too much current. It wouldn't be that difficult to use a 3 phase supply to run 400V at a varying current through one until it fails. I realise not completely straight forward to organise, but wouldn't cost more than a few thousand, maybe less with some creative thinking and right location.

    The alternative, which I quite like is to move to having the SPD connected to the protective device for a socket circuit, then the owner would also know when the SPD had failed.


  • Given all the money that's paid to various organisations it wouldn't be that hard or expensive to test some of these devices until they fail and see what happens.

    Shouldnt that be what the supplying Company should be doing to justify their certificate of compliance?

    And publishing those results?

    But then we can point to AFDDs with their total lack of information to the buyers/consumers as to when they will trip. I wonder if there are any stats to back up their introduction which show how many fires they have prevented. I won't hold my breath.

    And back to Companies self-certifying, they sold plastic consumer units that did not self extinguish or were flammable when the product standard clearly said they should be non-combustible/self extinguishing.

    Strange how none of these Companies have been taken to Court for this product failure on their part. (yes, I still have a bee in my bonnet about that!)

Reply
  • Given all the money that's paid to various organisations it wouldn't be that hard or expensive to test some of these devices until they fail and see what happens.

    Shouldnt that be what the supplying Company should be doing to justify their certificate of compliance?

    And publishing those results?

    But then we can point to AFDDs with their total lack of information to the buyers/consumers as to when they will trip. I wonder if there are any stats to back up their introduction which show how many fires they have prevented. I won't hold my breath.

    And back to Companies self-certifying, they sold plastic consumer units that did not self extinguish or were flammable when the product standard clearly said they should be non-combustible/self extinguishing.

    Strange how none of these Companies have been taken to Court for this product failure on their part. (yes, I still have a bee in my bonnet about that!)

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