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practical need for supp bonding in bathroom

wallywombat
Can anyone suggest a realistic scenario where supplementary bonding would be required in a bathroom or other 701 location? I'm failing to think of one, although I may be overlooking something blindingly obvious.


It can be omitted as long all three of these are satisfied: ADS in time; RCD present; any extr-c-p connected to main bonding.


If ADS can't be done in time by either MCB/RCD then its not legal anyway.

RCD has to be present anyway.

Water and gas pipes etc should already be main bonded if they introduce a potential.
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    Before we get too hung up about existing installations, let's consider just a new build to 18th Ed. Is there a scenario which is fully 18th compliant and which requires supp bonding?
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    Before we get too hung up about existing installations, let's consider just a new build to 18th Ed. Is there a scenario which is fully 18th compliant and which requires supp bonding?
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