It does not need supplementary equipotential bonding if all the circuits in the bathroom are 30mA RCD protected and all your main protective bonding is in order ie gas/oil and water bonded.
It does not need supplementary equipotential bonding if all the circuits in the bathroom are 30mA RCD protected and all your main protective bonding is in order ie gas/oil and water bonded.
... and all circuits in the bathroom meet disconnection time requirements, and all extraneous-conductive-parts in the bathroom are 'effectively connected to' the MPB.
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