Seals MET?

[DNS1]

Hi chaps,

Doing a mock EICR on a friends place to try and find out what's causing nuissance RCD tripping.

Was about to start and realised the MET is in a grey plastic box and sealed with a DNO seal... Didn't know the DNO sealed something like the MET, it's making it somewhat difficult to measure Ze.

Am I allowed to cut the seal? It looks like it was installed fairly recently, the electrics are about 50 years old, but the service head was replaced fairly recently, the MET box and seal look like they were installed at the same time...

Seeing as the incomming water and gas aren't bonded and the bond to the DB is far too small I'm going to have to get to the MET anyway at some point...

 

[malcolmsanford]

In all my years I have yet to see a DNO supply us with a MET for our use. Is this MET attached to the head as part of a TNC-S supply ? If not then what Earth system is it

 

[DNS1]

Yeah, it's TNC-S and the MET is mounted to the wall about 6 inches from the head.

 

[malcolmsanford]

So I assume you have a 6"+ piece of cable from the side of the head going into this MET

 

[DNS1]

Yeah, earth is about 6 inches of 16mm, the only thing in the place that's anything like the correct size!

 

[StuSpiers]

Snip snip.

What seals?

Someone doesn't quite know what there doing from dno, or a sparky with a new toy from ebay

 

[DNS1]

Oddly, the seal fairy seems to have visited while I was out for lunch...

None of the usual warning notices on the MET enclosure anyway, just on the meter and cut-out...

 

[MNR]

Oddly, the seal fairy seems to have visited while I was out for lunch...

None of the usual warning notices on the MET enclosure anyway, just on the meter and cut-out...

She's a crafty little bugger lol.