TN-C-S or TN-S ???

[Liam12]

Came across this on a rewire, looks to me like a TN-C-S, but had SNE on the side as you can see, we thought as the sheathing was metal it could mean (seperate neutral & earth) and be a TN-S, never seen before and could just be coincidence, a point in the right direction would be handy, cheers.

 

[VoltzElectrical]

I'll have 1st punt, TN-C-S. go, on poke fun at me!

 

[VoltzElectrical]

Oh, while I'm here, can you please rotate the photo, rather than relying on me rotating my tired head?

 

[Marnik]

Hard to tell from that pict. but would think TN-C-S

 

[Liam12]

Don't know why it done that, uploaded fine but rotated automatically, your going with. TN-C-S. I'm torn, baring in mind have not contacted DNO so I don't know myself

 

[SJD]

You can find data online about this type of cut-out which may help, at
http://www1.cooperbussmann.com/pdf/96e433dc-3586-4059-8ae7-882193dcf955.pdf
SNE = Separate Neutral and Earth module

 

[Marnik]

You can find data online about this type of cut-out which may help, at
http://www1.cooperbussmann.com/pdf/96e433dc-3586-4059-8ae7-882193dcf955.pdf
SNE = Separate Neutral and Earth module

justed looked at that, could be used for both TN-S and TN-C-S ???

 

[SYKRAPS]

Do a standard loop test at the incomer position and record the result and then do a loop test with both earth and neutral prongs on the neutral incomer and line prong on the line incomer and record the result, if the results are the same it should be TN-C-S and if there is a difference in the results the characteristics should be TN-S. Don't forget to only test the main earth cable to eliminate paralel paths. If this fails you can contact the supply authority for the information.

Hope this helps.

 

[Guest55]

its tn-c-s as voltz pointed out ;-)
tns would show earth coming from lead sheath , probably converted when cut-out was upgraded.

 

[Liam12]

Cheers buddy

 

[Liam12]

Yeah still requires further investigation, thanks for your input guys

 

[Marnik]

Do a standard loop test at the incomer position and record the result and then do a loop test with both earth and neutral prongs on the neutral incomer and line prong on the line incomer and record the result, if the results are the same it should be TN-C-S and if there is a difference in the results the characteristics should be TN-S. Don't forget to only test the main earth cable to eliminate paralel paths. If this fails you can contact the supply authority for the information.

Hope this helps.

You mean; PEFC and PSCC should come up with the same result = TN-C-S, if not then TN-S

 

[SYKRAPS]

You mean; PEFC and PSCC should come up with the same result = TN-C-S, if not then TN-S

If its PME the both PSCC and Ze would give the same results over a few inches of cables of this size I believe

 

[Marnik]

If its PME the both PSCC and Ze would give the same results over a few inches of cables of this size I believe

Noooo, NOT Ze and PSCC,but PEFC and PSCC!!!!

 

[SYKRAPS]

Noooo, NOT Ze and PSCC,but PEFC and PSCC!!!!

Forgive me if I am wrong but are Ze and PSCC not directly related via ohms law?