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I think the new white box on the rhs (Toonfrequentontvanger) could be a surge protection device ? Not sure about the old grey box next to the CU, isolation switch perhaps ? For obvious reasons I thought it best to keep my hands firmly in my pockets.Thats of interest.Traditionally Holland had a TT supply system.I,m not as up to date with European standards as I used to but that 2 mt earth rod would,nt suffice for the electrical installation you showed in the picture as its resistance would be too high to blow a fuse under fault conditions.Unless there is an rcd present there as well somewhere? Have I missed it in the picture? There is a device to the right of the fuses but I can,t quite make out what it is.