But not of the sort usually used by DNOs for TN-S. (For good reasons, AIUI)it looks like you have an earth clamp on the incoming supply cable,
I can't see anything connected to that clamp.then connected to an earth conductor that enters the joint box
Difficult to say in regards of the supply arrangement, looks mid to late 60s, how old is the property?Also does anyone know approximately how old the installation looks?
Not unusual at all, it is common method of the earth being supplied, in my location this is the most common arrangement I come across.Ok is it an unusual design/system? Or just old
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