Has anyone seen a service head like this before?

[marc8]

Good shout I am emailing clinet not to make this priority, side point is that we have a 2.5mm copper cable supplying the entire house which must have been like this for some time bloody hell!!!

2.5mm bare copper wire is roughly round about, in the same ballpark, approximately, equivalent to a 100A fuse wire, so what's the problem? [/QUOTE]

remember years ago being disturbed while I was doing some testing to find circuits in a very rubbish install & I used bit of 1mm as a link & forgot & put the main fuse back in with link still in place the 1mm copper held up the main 60amp fuse did not.
had replacement head fuse on board. new what I had done immediately removed link re-instated power & finished testing.
that 2.5mm will probably hold as long as it has been in place.

 

[UKMeterman]

Well LN-E I would have understood I was just not sure why you specifically just spoke of a neutral to Earth fault.

Have a think of an RCD and which faults it can detect compared to an MCB and get back to us...

 

[UKMeterman]

There is also the small mater of the current capacity of the meter and other suppliers works that you are tampering with....

 

[sparkdog]

An IR check.

 

[GMES]

After a staff discussion I am closing the thread on the grounds that what is being shown is illegal and also because we have a lot of trainee electricians on the forum and I don't want them to think that this is an acceptable way to do things.