Spd & 18th..............,,,,,,

[bigspark17]

So am i correct than reg 443.4 means unless we provide a risk assesment that states why we are not using a spd in consumer unit changes then we must fit one??

 

[Deleted member 105166]

443.4 continues with a catch-all, after (i) through (iv) are satisfied, by detailing an exception to the requirement being "single dwelling units where the total value of the installation and equipment therein does not justify such protection". Personally I can't see many exceptions, when considering the small price of installing this protection, ultimately this would be the insurer's call and I imagine it will not be long before buildings and contents policies stipulate SPDs as a requirement in their T&Cs.

 

[buzzlightyear]

443.4 continues with a catch-all, after (i) through (iv) are satisfied, by detailing an exception to the requirement being "single dwelling units where the total value of the installation and equipment therein does not justify such protection". Personally I can't see many exceptions, when considering the small price of installing this protection, ultimately this would be the insurer's call and I imagine it will not be long before buildings and contents policies stipulate SPDs as a requirement in their T&Cs.

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[bigspark17]

Ok buzz i get that you will not be installing them.

Would be intersted if other members will be taking the same approach?

 

[JOURNEYMAN]

you have more chances of being kissed on the lips by a giraffe.[/QUOTE]

I was kissed by a giraffe once when I was a kid on a visit to Flamingo Land Zoo many years ago. It lent over it's enclosure fence and reached down to me. I thought it was going to let me stroke it's head but it gave me a smacker on the forehead which is just as well as I wasn't into all that French kissing stuff at that age!

 

[buzzlightyear]

Ok buzz i get that you will not be installing them

I take your concern.
this is whet I will do for the next cu change next year .well mr &mrs customer would you like a nice SPD on your CU .tell them what they are for .---- a coin heads you have one .and tails your life .

 

[Chris Gardner]

It’s applicable to all installs no matter whether in a commercial or domestic setting.

I think it’s a very brave move to not install SPD’s as standard

With AFDD’s you can make a case in some circumstances to leave them out but given the detail for SPD’s in regs I simply can’t see anyone has the same ability not to install them given the detail required to assess the need

 

[Leesparkykent]

The Hager 18th seminar chap basically said when it comes to single dwellings then if it’s TT/overhead or has PV install a SPD.....If it doesn’t then you don’t really have to worry about it.

 

[Gavin John Hyde]

I fitted an spd in the CU in my flat when i changed it over to all rcbo's Hager SPD's not that big compared to some. has a type c 125A MCB then SPD modules the size of standard mcb, its a sort of carrier where the spd part can be popped out and replaced if required.
Back when I fitted it, it came to £68.
the mcb links to spd via a piece of 6mm brown.
Fitted it as the people who wired my flat (new build) didnt fit one, the risk assessment said one was needed and coincidentally they came back to fit them in other flats after i raised it with freeholder!

 

[Leesparkykent]

Has anyone actually carried out the calculation assuming a few figures that you aren’t going to know like the length the supply cable to the DNO TX? Unless your bang on top of the TX I can’t see it ever being above 1000.

CRL = Fenv /(Lp x Ng)


Fenv is an environmental factor selected according to Table 443.1
Lp is the risk assessment length in kilometres, and
Ng is the lightning ground flash density measured in flashes per square kilometre per year relevant to the location of the power line and connected structure.

Unless you can get all the above info then your going to fitting them on commercial jobs..

For domestic a get-out-clause is given for ‘single-dwelling units’ where the ‘total value of the installation and equipment therein does not justify such protection”.

For someone with just a sky box and tv, doesn’t really justify such protection. For someone that has multimedia setups, intelegent lighting controls, smart heating controls and so on it probably does justify having one fitted.

For the cost of them which aren’t massively expensive then it would be worth having a chat with the customer about having one fitted. Last house I done spent 7K on a HDMI matrix so I don’t think he would be bothered about an extra 60 quid for a SPD.

 

[Wilko]

I don't have a position on the changed requirements for spd as yet. But what I do know is I've not seen one in a single dwelling and I'm not had any complaints from my little band of Customers that any equipment has ever suffered. Hmmm

 

[buzzlightyear]

considering most spikes come from the DNO.UNDER GROUND OR OVER LAND .E.G.TT. like lighting strikes THEY SHOULD PUT THEM IN. why am I shouting .

 

[Ian1981]

Hey guys
This is Napits take regarding SPD’s in domestic single dwellings
I’m going to an niceic tech talk the 6th December and will report back what their guidance/ stance is regarding the matter
Note that the lack of need of the CRL is not required for domestic dwellings or necessarily the need of SPD’s according to their advice

 

[Midwest]

The requirements defined by the IET & BSI are what carries weight, not a manufacturer's interpretation...

Buzz was correct then.

 

[Ian1981]

Has anyone actually carried out the calculation assuming a few figures that you aren’t going to know like the length the supply cable to the DNO TX? Unless your bang on top of the TX I can’t see it ever being above 1000.

CRL = Fenv /(Lp x Ng)


Fenv is an environmental factor selected according to Table 443.1
Lp is the risk assessment length in kilometres, and
Ng is the lightning ground flash density measured in flashes per square kilometre per year relevant to the location of the power line and connected structure.

Unless you can get all the above info then your going to fitting them on commercial jobs..

For domestic a get-out-clause is given for ‘single-dwelling units’ where the ‘total value of the installation and equipment therein does not justify such protection”.

For someone with just a sky box and tv, doesn’t really justify such protection. For someone that has multimedia setups, intelegent lighting controls, smart heating controls and so on it probably does justify having one fitted.

For the cost of them which aren’t massively expensive then it would be worth having a chat with the customer about having one fitted. Last house I done spent 7K on a HDMI matrix so I don’t think he would be bothered about an extra 60 quid for a SPD.

So you think we can only realistically install type 2 and type 3 in non domestic installations as with a type 1 you would require an LPZ in place which I understand would require a risk assessment done for lighting strikes on the building, something that I couldn’t advise on and would struggle to put across to a client to justify needing one.
Normally larger new build commercial jobs where the design aspect is out of the installers duties as when done by a consultant it would be specifie (lighting protection)

 

[Leesparkykent]

So you think we can only realistically install type 2 and type 3 in non domestic installations as with a type 1 you would require an LPZ in place which I understand would require a risk assessment done for lighting strikes on the building, something that I couldn’t advise on and would struggle to put across to a client to justify needing one.
Normally larger new build commercial jobs where the design aspect is out of the installers duties as when done by a consultant it would be specifie (lighting protection)

From what I’ve read a type 2+1 SPD for TT overhead.

Type 2 if underground

type 1 or type 2+1 if lightning protection in place

https://www.hager.co.uk/files/download/0/4540_1/0/Surge_Protection_Guide.pdf

Page 17 quick selection guide of SPD’s