How to tell which type of supply?

[bertoli]

How to tell which type of supply my house has?

It was installed 9 years ago(as house was newly built).

I have looked at the "For reference" thread, but as the incoming supply to my house goes directly into a sealed box, how can I ell if it is TN-C-S or just TN-S?

Many thanks for any advice given.

 

[plugwash]

its either TN-C-S or TN-S probablly TN-C-S but your right you can't know for sure without opening the cutout (which i don't reccomend) or possiblly taking some measurements (e.g. measure both PN and PE loop impedance and look to see if there is any difference).

 

[ban-all-sheds]

I can't read what that label says, but given that it all looks fairly new and very neatly done, I'd be surprised if there wasn't a proper PME warning label if it were TN-C-S.....

 

[Qedelec]

Looks PME to me too.

I think that cut out is only used on TN-C-S.

Would be nice to read the green writing though.

 

[plugwash]

from the bits of the green writing i can make out it seems to be a warning to check bonding before connecting earth which would suggest PME.

 

[bertoli]

As in the picture, it states

"Connect to common earth on customers installation only after insuring satisfactory cross bonding of services. Use 16mm2 earth cable"

Below is a picture of the boxes immediately to the left of the first picture.

thanks.

 

[ban-all-sheds]

IMO the likliest interpretation of that notice is that you have got TN-C-S.

 

[Lectrician]

That is a PME curout - only has a single brass neutral - (no split brass with a link).

Neatly done......Looks a pigs ear to me!

 

[ban-all-sheds]

Compared to what we usually see on here it's a work of art....