Garage mains wiring query ??

[ericmark]

I was more looking at lack of earth bonding, but yes we use rings a lot so that sections can be isolated, but with domestic we are talking about ring finals which are not the same thing, but the word final does cause a problem, as English does not allow things like very end, or the final final, so we have used different names like spur and fused spur. The regulations show examples of rings finals and radial finals.

 

[JohnW2]

I was more looking at lack of earth bonding,...

What does this relate to? Are you talking about earthing or bonding - and of what?

 

[EFLImpudence]

Ring circuits appear all over the place apart from the regular 32A ring final and rings were in use decades before WW2.
Oh and excuse the quality of the tester and photo but this is a 6A lighting ring.

Yes, but you know that is not comparable to the UK socket ring with undersized conductors and special dispensations.

 

[EFLImpudence]

Oh - and very unlikely in the OP's house.

 

[securespark]

If you want to beef up the radial circuit, replace the 16A MCB with a 20A one.

 

[JohnW2]

If you want to beef up the radial circuit, replace the 16A MCB with a 20A one.

Indeed - I should have said that.

In fact, assuming that the 2.5mm² cable is installed Method C (very likely in a garage) then, if one is available for his CU, even a 25A MCB would be OK.

 

[SUNRAY]

Oh - and very unlikely in the OP's house.

You are very likely correct, however a few weeks ago I encountered a ring edited for nit picking INTENDED SOLELY FOR AND LABELLED ON CU AS fridge/freezer, router, tv aerial amp/splitter, in total 2 DSSO + 1 SSSO on a 6A RCBO in a very ordinary semi detatched house

 

[JohnW2]

You are very likely correct, however a few weeks ago I encountered a ring dedicated to fridge/freezer, router, tv aerial amp/splitter, in total 2 DSSO + 1 SSSO on a 6A RCBO in a very ordinary semi detatched house

I'm not sure that such a circuit qualifies as being "dedicated" (to anything)

 

[Harry Bloomfield]

I had an extension done a couple of years ago, and part of that was a new garage. The qualified electrician did all the wiring, including a new fuse box which lives in the garage. There are 3 x 240v double sockets and I wanted to add a new double socket, so I was checking the the wiring the electrician did. To me, the three double 240v sockets don't look to be a ring main. To me it looks like they are all spurs (see attached diagram) ??

It's probably a radial circuit, and dependant on the MCB protecting the ciruit - yes, you can just add another socket, or sockets, using the same size cable as the other sockets.

 

[EFLImpudence]

You are very likely correct, however a few weeks ago I encountered a ring dedicated to fridge/freezer, router, tv aerial amp/splitter, in total 2 DSSO + 1 SSSO on a 6A RCBO in a very ordinary semi detatched house

Well, I hope you mention that in future every time someone asks about amending their socket ring circuit and also point out that quite often people do stupid things that are nothing to do with 433.1.204

 

[SUNRAY]

I'm not sure that such a circuit qualifies as being "dedicated" (to anything)

Hopefully my edit is satisfactory

 

[SUNRAY]

Well, I hope you mention that in future every time someone asks about amending their socket ring circuit and also point out that quite often people do stupid things that are nothing to do with 433.1.204

All I pointed out is ring finals exist all over the place and have done for decades before 433.1.204 and its forerunners ever did. Many of those are correctly designed and far from stupid.

 

[Heatslave]

Oh - and very unlikely in the OP's house.

My house is an old 1948 semi detached ex Council house. When I moved in 23 years ago I completely rewired it myself (I know, very naughty ), adding many double sockets that it lacked both upstairs and downstairs. Both upstairs and downstairs were on what I assume is a bog standard ring main. That’s why I thought my new garage should have been on a ring, it’s all I’ve ever dealt with, and I just thought that was standard practice. Obviously not, and I’ve learned something new

I’ll try and dig out some pics of the old fuse box arrangement…..you're in for a treat !!

 

[Heatslave]

The old fuse box…..

 

[JohnW2]

My house is an old 1948 semi detached ex Council house. When I moved in 23 years ago I completely rewired it myself (I know, very naughty ), ...

There was nothing naughty about that, at least as far as the law was concerned, 23 years ago, but one hopes that you were 'competent' to do what you did

Kind Regards, John