Is this a TT Supply ?

[quickie]

Just thought i'd check............

 

[Adam_151]

Yeah, no earth from the service head and a main RCD

Looks like you have a PME earthing terminal, might be worth a call to your rec to see if you can use it (checking that their neutral is of high enough integrity and tied down to earth enough), and once you get the go ahead from them, then give it a quick test with an EFLI tester to make sure its actually connected inside the cutout.

Or just leave it as TT

 

[Har_vey]

TNS Supply, but hopefully has a rod somewhere as the earth terminal is missing a cable!

That's a 100ma RCCB too.

Is there an additional 30ma anywhere?

 

[tekkiesteve]

tns

 

[Lectrician]

DEFFINANTLY TT at the moment! Assuming you have a rod somewhere.....otherwise it's an old school system with water-main earthing, or a dodgy spark leaving the rod out......to many of them around.

The head does look like a TT - The consentric cable looks like a 16mm split-con(TN-S) type, or a 25mm straight-con(TN-C-S). Very rare to see a 25mm service, so am leaning towards TN-S.

I also lean more towards TN-S than PME/TN-C-S, as PME heads usually have the earth terminal closer to the neutral, and the terminal is also enclosed, not exposed. This is true for the WPD area atleast.

 

[Softus]

How can you tell that the grey stuff isn't 10mm Hep2o?

 

[selfbuildy]

Thats why ur a plumber!

 

[Har_vey]

How can you tell that the grey stuff isn't 10mm Hep2o?

because they don't use that to seal the cut out. It's a standard meter seal. Honest

 

[securespark]

EFLI check sometimes gives the game away as to the system type...

 

[Steve]

The output from the RCCB - look where the tails go . . . .

 

[Softus]

The output from the RCCB...

Tails? Wot - the pair of 15mm Hep2o pipes?

 

[ebee]

On IT equipment is there 1024 watts in a killowatt?

 

[Softus]

I suppose there would be.

 

[securespark]

The output from the RCCB - look where the tails go . . . .

Into the back of that socket outlet....

 

[quickie]

Thanks for all your replies............

There are a couple of earth rods.New shower/fuse board to be fitted in the future,so my Uncle who is a qualified spark will be testing out the system before work commences.

Paul.