Garage & other external buildings

[cliffed]

Finished a Eicr,just your thoughts on this,the remote garage is supplied from the ring main of the house,other building are radials of this.
The supply enters from underground,& are pvc t&e,goes straight into a 2g power point,then to other points.
There is no main bonding required,thinking this needs isolation when entering the building,& other supplies protected accordingly.
Would you fit a small DB on the main in,or a complete no no,cause it’s a ring main.

 

[cliffed]

There’s no real way to prove the cables don’t comply.

 

[cliffed]

There’s no real way to prove the cables don’t comply.

What does the original C2 actually state.

C2 referred to the connection in the garage,theres no actual wording about the supply or installation of the cables,only of a ring main suppling garage

 

[westward10]

To what effect, what does it actually state.

 

[cliffed]

It’s like starting all over again,a ring main supplies the garage,there are radials from this power socket,going elsewhere.
Will I need isolation at this point,there isn’t any mention of cables supplying the garage,I have no idea how they have been installed,only that they are entering the garage from below.

 

[westward10]

You have been asked to remedy the C2s, so what does C2 actually state????

 

[cliffed]

Not much really,I personally think it needs isolation,& circuits protected appropriately.

 

[westward10]

That is what the C2 states, isolation at the garage?

 

[cliffed]

Yes,

 

[Deleted member 9648]

From what I'm reading I cant see that a ring feeding an outbuilding is potentially dangerous, with or without isolation. 'Radials'(?) fed from the ring....I assume you mean spurs with more than one point, will only be potentially dangerous if they may reasonably be expected to carry substantial load but a code 2 may well be appropriate. I cant see why it is not possible to verify the type of underground wiring, surely if it cant be verified at the supply end it will be visible at the garage end?

 

[cliffed]

Ok agree,I will check on that,but if the cable does not comply,it will be noted,& given to the client,who will then decide how we go from there.

 

[Richard Burns]

Within the context of an EICR you can only verify things that do not cause damage to the installation. Therefore it is not possible to verify the cable installation method in its entirety, as wirepuller has just posted some estimate of the method of installation should be possible; certainly now that you are onto remedial work.
To have a double socket in the garage on the house ring is not a problem, to then supply multiple other points from this double socket is nominally possible if it is considered as multiple spurs, each to a maximum of one double socket or the current for that spur is limited to 13A. If this is the case then the cables are protected from the remote possibility of overload. There is still the minor consideration of ensuring loads are equally distributed around a ring which would not be the case here since there could be a considerable concentration at that point, however on a practical basis is there a lot of loading in these outbuildings? If you feel you can limit it to 13A then one assumes not and so it becomes less of an issue.
I would apply the 13A limitation after the garage socket. If you feel that local isolation is necessary in the other buildings then install a DP switch in the buildings.

 

[westward10]

I am totally lost on this if the only thing the Report stated in C2 was isolation at the garage, What exactly does that mean.

 

[cliffed]

Within the context of an EICR you can only verify things that do not cause damage to the installation. Therefore it is not possible to verify the cable installation method in its entirety, as wirepuller has just posted some estimate of the method of installation should be possible; certainly now that you are onto remedial work.
To have a double socket in the garage on the house ring is not a problem, to then supply multiple other points from this double socket is nominally possible if it is considered as multiple spurs, each to a maximum of one double socket or the current for that spur is limited to 13A. If this is the case then the cables are protected from the remote possibility of overload. There is still the minor consideration of ensuring loads are equally distributed around a ring which would not be the case here since there could be a considerable concentration at that point, however on a practical basis is there a lot of loading in these outbuildings? If you feel you can limit it to 13A then one assumes not and so it becomes less of an issue.
I would apply the 13A limitation after the garage socket. If you feel that local isolation is necessary in the other buildings then install a DP switch in the buildings.

Thanks.

 

[Octopus]

I suspect the C2 is for spurs off spurs ............... so a single 13A FCU would fix this issue!

It may create other issues ................... but would "fix" the C2!

 

[westward10]

Shame the person who compiled the Report cannot quote understandable statements.