Spot the error

[Lectrician]

I am doing some alterations to a fairly large B&B.

Needed to isolate a socket circuit from this sub-mained fuseboard.

Spot the obvious errors? (other than the fact it is old and very untidy).

 

[bongos]

The B40 on a fuseboard with a maximum rating of 60A and what's going on at the bottom of the main switch or is that cable just fed in behind it?

 

[chapeau]

There is insufficient information provided to say without doubt the picture demonstrates the error Lectrician is looking for.

 

[bongos]

There is insufficient information provided to say without doubt the picture demonstrates the error Lectrician is looking for.

I thought that on a max 60A rated fuseboard (sticker in bottom corner) that you couldn't have any fuse greater than 30A?

Also the left hand fuse has a 32A fuse with three cores, the next has only one. Looks to be in 2.5mm².

One leg from the ring put in the wrong fuse?

 

[chapeau]

Ah, but that isn't the answer he is looking for.

Well I don't think it is....

I could be wrong of course.

 

[oharaf]

The cable out the 40A Fuse looks under sized to me!!!

The first 30A either has a ring and a radial coming out of it all on 2.5mm, so the radial is under size or as mentioned earlier.

therefore the second 30A appears to have a 2.5 radial also and the last 30A is also a radial

The fuses are not inrated order, mixed fuse types.

I agee the 40A shouldn't really be in there as the board is 60A

are there some screws missing out the isolator as well?

 

[electronicsuk]

The first 30A either has a ring and a radial coming out of it all on 2.5mm, so the radial is under size or as mentioned earlier.

It might only feed a single socket, in which case it should be treated no differently to a single spur from the ring.

 

[ban-all-sheds]

The cable out the 40A Fuse looks under sized to me!!!

There are 2, so it might be a compliant parallel circuit.

The first 30A either has a ring and a radial coming out of it all on 2.5mm, so the radial is under size or as mentioned earlier.

therefore the second 30A appears to have a 2.5 radial also and the last 30A is also a radial

Or maybe there's a ring with each end in it's own fuse/MCB?

Whatever has been done the best to be hoped for is 2 rings and 3 single-socket spurs/radials (or some single fixed loads), but with 7 conductors split 3-1-3 over 3 devices all manner of nasties could be going on.

Don't think we should be too definite about cable sizes though, because there may be some camera angle/lens characteristic issues - none of the blacks look the same size as the reds.

 

[ban-all-sheds]

what's going on at the bottom of the main switch or is that cable just fed in behind it?

Looks like it's supplied by that T/E that comes down the LHS and the loops up underneath.

 

[Spark123]

Terminal shrouds missing on incomer.
Excessive conductor length showing on incomers.
As has been said, B40 in a 60A CU - max 32A per way and what look like 2 x 2.5mm in it.
Incorrect order of neutrals and earths? There is what looks like a 10 or 16mm earth in there, what is this for?
No RCD protection

 

[mfarrow]

Terminal shrouds missing on incomer.

That doesn't matter in this picture anyway - the isolator is on

Apart from general untidyness there's nothing there that looks out of place and couldn't be explained by the design of the circuit.

 

[martinxxxxxx]

The 40A breaker is the slot where the 30A fuse should be, and vise versa

 

[Spark123]

I don't think the 40A MCB should be there at all.

 

[ColJack]

Terminal shrouds missing on incomer.

That doesn't matter in this picture anyway - the isolator is on

Apart from general untidyness there's nothing there that looks out of place and couldn't be explained by the design of the circuit.

you mean appart form the single 2.5 cable being protected by a 32a breaker???

 

[electronicsuk]

The 40A breaker is the slot where the 30A fuse should be, and vise versa

How did you come to that conclusion :S