Domestic SPD's help please

[LWB Electrical]

Hi,

Apologies if this has been posted before which I expect it has but did a search and couldn't find it. Wabt a bit of information on SPD's in domestic premises when carrying out a consumer unit change. Do we have to recommend they are installed now and if not carry out a risk assessment or are we ok not to carry out a risk assessment as its a single dwelling? Also am I right in thinking its a type. 1 that mounts in a din rail enclosure and if so does anyone have a decent wiring diagram. Did a bit of research but still unclear.

Many thanks

 

[Ian1981]

Many thanks. To me id interpret that as no risk assessment needed. Guess it's only a matter of time till an amendment makes them compulsory everywhere and all boards have in built ones

Well we work for some of the known house builders and with new sites tenderd to the 18th edition we are to fit Hager dual rcd boards with 2x 100amp 30mA rccb’s type A.
Also 2 x high integrity ways for SPD’s and electrical vehicle charging points as in a recent tech talk I was informed that the government, when they are finished with brexit are implementing a scheme that all new builds to have a provision provided for electric vehicle charging, so a circuit from the DB left unterminated to an outside enclosure for future proofing.

 

[Ian1981]

Duplicate post

 

[Nebu1a]

OSG 3.7.2 Implies SPD protection is not required for domestic single dwelling units but the impulse withstand voltage must meet Table 443.2.
Is this printed on the appliance or must we dig out the instructions to every appliance in the property?

Beama guide suggests a written assessment of the value of the installation. If this value is 5 times greater than the cost of fitting an SPD then an SPD should be fitted. (pg 63 beama guide)

I guess it depends on the size of the job. For a couple of extra sockets can I justify it to the client then probably not. Id give them the option though.
For a rewire then yes.