- 28 Feb 2005
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This "clamp at the meter" - do you mean it's clamped around the incoming cable? If so, like my 1937 installation, it's TN-S (Earth is provided seperately from Neutral, using the cable-armour/sheath). A photo would make it easier to decide for sure, though.felix said:It comes in underground and is coated in what looks like bitumen. There is an earth clamp at the meter to which is connected the earth wire of a modern consumer unit. This is the only true earth in the house because the water pipe is plastic and the iron gas pipe is, like the power cable, encased in bitumen. Would anybody like to hazard a guess as to what kind of supply this is?