The earth is separate in the supply cable to the neutral so TN-S
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Discuss Opinion on Supply System Type Wanted: TN-S or TN-C-S in the The Welcome Forum area at ElectriciansForums.net
Hi,
1. Why did you open the head? You have no right to do so and the older ones can and do go bang. (research arc flash).
2. When you did the the PEFC test did you isolate the installation, disconnect the earth cable from the terminal shown and test at that terminal?
The neutral and cpc are not combined in the service head and are separate split like the pictureI would go for TN-C-S.
If you look carefully at incoming supply, the concentric cable has only 2 conductors. The centre line conductor and outer stranded neutral. Part of the stranded neutral has been seperated and used to feed the earth terminal. (Effectively creating a link between them) the remaining strands have then been painted black to form the neutral conductor.
So to my eyesight, which is not what it was, it's combined in the service head, therefore TN-C-S.
View attachment 37591
The neutral and cpc are not combined in the service head and are separate split like the picture
View attachment 37591
The neutral and cpc are not combined in the service head and are separate split like the picture
Reply to Opinion on Supply System Type Wanted: TN-S or TN-C-S in the The Welcome Forum area at ElectriciansForums.net