How not to upgrade the main earth

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Nope, that was the main earth. Who ever fitted the board clearly couldn't be bothered to pull a new cable through the wall to the meter cabinet. There's a few other old earth bonds that disappear somewhere, gas bond is 10mm, another 10mm bond runs off to the water, but the main earth...
 
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I take it the choc block was pushed back through the hole so to a casual observer you would not see it or the old cable (unless you looked in the meter box)
Yep. I was looking in the meter box wondering where the skinny green cable went, I found out when I took the old board off 😄. I reckon this bodge was done about 25 years ago when the kitchen was fitted. Someone else has run a 10mm shower cable and 10mm earth bond since then, no doubt thinking the main earth was up to spec.
 

Fleeting

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I don't want to be pedantic here but the correct terminology, for casual observers here is earthing conductor and not main earth.
 
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Well that earth has to be better than the 6mm (imperial equivalent) TT earth that when you followed it out the front door frame the corroded end of the cable nearly reached the corroded rod sticking up.
 

Dranok

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6mm²?!? Ooh, the luxury! My house (1956) has a 2.5-equiv green thing from the MET (external to my CCU) snaking across the loft space through unknown spaces (no mechanical protection, not even clipped) until it exits across the house to my rod electrode, a piece of steel bar in the ground, the joint being an inch diameter lump of painted corrosion. And yet I still get 6Ω off it so I didn't dare touch it when I upgraded the old rewireable fuse boards, I just went full RCBO with Type S incomer...
 
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