TNCS Service head, earthing and bonding

Toby Kuhnert · Nov 13, 2013

Went to quote for customer's dis board upgrade today found this gem! looks like 6mm main earthing, main bonding etc going into the MET within service head.. also no plastic case on head. I presume I would contact DNO to resolve and provide 16mm + additional MET? Just haven't come across this yet.
There are other big issues with the installation that are obvious so quoted for EICR previous to DB change. Also don't fully understand why there are two meters still as DNO fitted digital one only a few years ago? I think the other one is redundant as can't see what its supplying... there has never had a rented area within the property to justify another meter..
thanks

[ElectriciansForums.net] TNCS Service head, earthing and bonding

GLENNSPARK · Nov 13, 2013

Toby Kuhnert said:
I think i've overthought this! thanks for your help though..

oh..your allrite toby...

Guitarist · Nov 13, 2013

Toby Kuhnert said:
I think i've overthought this! thanks for your help though..

It's easy in this age of rules and regs to overthink what we can and can't do. You won't be the last

driverman · Nov 20, 2013

Could that DNO cut out be TN-S and not TN-C-S as OP suggest. I'm just wondering if there is a link under the plastic cover which shorts out the neutral and earth block for PME. At the end of the day test will confirm which system used.