Meter tails upgrade for assessment

[s.keech]

I will registering with elecsa soon and going to change c.u in my flat for assessment. Line conductor is 10mm,Earthing conductor is 10mm and bonding conductor is 6mm . I don't know cut out fuse size as it is sealed. The c.u. only has 6 circuits. O.S.G says these are minimum required. Do I need to upgrade to 25,16 or 10 or can I leave it as is or does it depend on size of cut out fuse.Thanks

 

[kingeri]

What are the earthing arrangements?

 

[s.keech]

Tn-c-s

 

[kingeri]

So your tails are 10mm? Are you sure they're not 16mm? Are you on a submain with it being a flat?

 

[s.keech]

definitely tails are 10mm

 

[Octopus]

Is there a switched fuse in the "control" room/cupboard?

 

[s.keech]

No switch fuse, just d.n.o cut out fuse

 

[Octopus]

No switch fuse, just d.n.o cut out fuse

how far away from the flat CU?

 

[s.keech]

2 metres away

 

[telectrix]

16mm tails for up to 80A DNO fuse. 25mm if 100A.

 

[s.keech]

just over 2 metres , other side of wall

 

[Octopus]

2 metres away

Maybe you should get the DNO out to fit an isolator than you can have 16mm or 25mm from there to the CU??

 

[bigbaddave]

It all depends on the main DNO fuse, This if you can not confirm will become clearer when the install is isolated.