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What is going on with SPD's and A3

Discuss What is going on with SPD's and A3 in the UK Electrical Forum area at ElectriciansForums.net

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We were all told that SPD's were mandatory under A3 from September last year and even sat through the webinar spelling it out. I work an area with lots of overhead lines, I ran out of the Type 1's I bulk buy online and could not find any local wholesalers who stocked them (type 2 yes but no type 1). It seemed strange that it is now mandatory to fit them but you can't buy them at the wholesalers.

Fast forward a few weeks and I am sitting in an Aico fire alarm training session and I raise this point afterwards with the trainer. His response was that no one stocks the expensive Type 1's because they aren't mandatory, they realised that making it mandatory was a stupid idea and they pulled that amendment.

So what is going on? Did they pull the amendment? Is the amendment still in force but being largely ignored? What's going on with this...
 
Didn't know aico made SPD's or contributed to the AMD3 discussions about SPD's....

I'd take what the aico trainers say with a pinch of salt.... They only know the rules and regs that pertain to fire detection.


Agree that type 1's are few and far between.... Its always type 2 that are included in new boards... and i suppose a type 2 is better than none at all.
 
Didn't know aico made SPD's or contributed to the AMD3 discussions about SPD's....

I'd take what the aico trainers say with a pinch of salt.... They only know the rules and regs that pertain to fire detection.


Agree that type 1's are few and far between.... Its always type 2 that are included in new boards... and i suppose a type 2 is better than none at all.

They did contribute in as much as they raised concerns over mandating SPD's. Mains fire alarms are cheap life saving devices and Aico apparently realised that not being able to fit a £20 mains fire alarm in a home without also fitting SPD's that costs 10 times that was not an entirely clever idea.

Type 1 is purely to arrest lighting strikes and according to the manufacturers type 2 won't do a thing to arrest a spike from lightning. That said the grid are required to have lighting arrestors on the poles every 500 meters so a strike would have to be incredibly close to get to the home. If it was that close would a double width module on a DIN rail really arrest that much energy? I very much doubt it.

I will have to ring Napit on Monday when I get chance but it seems very strange that no one stocks Type 1's in an area that has masses of overhead lines.
 
Mains fire alarms are cheap life saving devices and Aico apparently realised that not being able to fit a £20 mains fire alarm in a home without also fitting SPD's that costs 10 times that was not an entirely clever idea
I don't know why you think you can't fit smoke alarms without an SPD.
I don't want to cause you to faint but I have added smoke alarms to VIR lighting circuits and lighting circuits with no CPC. In the former case the house was a fire waiting to happen and I felt the family waking up was more important than anything else.
 
So we’re still on AMD2?

Lots of things are still marketed as amd3 compliant, referencing the 17th Ed…. So what came out in 17 amd 2 that wasn’t so important to warrant mass marketing?
 
We were all told that SPD's were mandatory under A3 from September last year and even sat through the webinar spelling it out. I work an area with lots of overhead lines, I ran out of the Type 1's I bulk buy online and could not find any local wholesalers who stocked them (type 2 yes but no type 1). It seemed strange that it is now mandatory to fit them but you can't buy them at the wholesalers.

Fast forward a few weeks and I am sitting in an Aico fire alarm training session and I raise this point afterwards with the trainer. His response was that no one stocks the expensive Type 1's because they aren't mandatory, they realised that making it mandatory was a stupid idea and they pulled that amendment.

So what is going on? Did they pull the amendment? Is the amendment still in force but being largely ignored? What's going on with this...
There was a little adjustment in the corigendum that came out earlier this year
 
My apologies, it is A2. It has been a very long week.

@loz2754, Type 1 SPD's are also required for overhead supplies. See How to choose an SPD - Surge Devices - https://www.surgedevices.co.uk/2346-2/

Napit told us very clearly that from A2 the risk assessment was gone and you cannot decide by calculation any more. The single dwellings special dispensation is also gone.

We were walked through the new 443.4.1

Protection against transient overvoltages shall be provided where the consequence caused by overvoltage could:

i. Result in serious injury to, or loss of human life, or
ii. Result in failure of a safety service, as defined in part 2, or
iii. Result in significant financial loss or data loss


We were directed to Page 18 of A2 that clarifies the word ‘shall’ is to be read as a requirement. After making it clear that it was a requirement we were told that mains fire alarms were covered in subsection ii. They rambled on for a bit but made it clear we had no choice but to fit SPD's even in single dwellings

So the advice is clear and there is no way round SPD’s and yet Type 1's are not for sale in any local wholesalers where half the homes have overhead lines. Am I the only 1 changing Consumer Units? (a rhetorical question). Something has changed or the lads are cocking a deaf ear to it. The lad from Aico says it has changed but couldn't reference a document to that effect. Hmm...
 

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