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Installed a cooker circuit on a fairly new house, found a 16 mm main earth and 10mm bond to Gas pipe. No water bond, there is a blue plastic water pipe entering house to stop cock and then copper pipe, lots of internal plastic pipe. Boiler has copper pipe with no cross bonding. The consumer unit is Wylex split board with dual 30ma mobs. Should I upgrade earthing or is this install OK due to the water pipe is not an extraneous conductive part?
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