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Bonding a metal bath

David-Adams
Good evening


I am having one of those moments where I can’t sleep because I am worrying about something I probably don’t need to. That’s the rational part of me talking, unfortunately the anxiety monster won’t b***** off. 


We have just had our old cast iron bath replaced with a nice new shiny steel one. The old bath was bonded back to the terminal block by main consumer unit over 6mm earth cable via the airing cupboard. We also have an electric shower. 


The new bath has no taps on it (they are wall-mounted and fed by copper pipes). The waste is all plastic. The electric shower has been replaced with a new electric shower. The copper pipes in the airing cupboard have been connected via a new 4mm earth cable. My electrician says that according to the 18th edition, there is no requirement for the metal bath to be bonded. 


I have no reason to doubt him, except for the anxiety monster eating away at my brain I mentioned earlier. What limited literature I have found seems to suggest this is correct, but in some circles it is a hotly debated topic with contradicting views. I was just wondering if someone could confirm this for me please. I would also be interested in understanding why this is the case to satisfy my own natural curiosity of all things!


Many thanks in advance
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  • 0
    A negative head single impeller shower pump to fill the new bath up with hot water before it goes cold and to over power the thermostatic mixing valve in the new mono block mixer tap.


    That is a pressure vessel sitting on top of it that helps it to know when someone has turned the hot tap on.


    Once again it will be plastic pipework from the new isolating valves to the mono block thermostatic mixer tap mounted in a fibreglass bath with a plastic waste pipe, the risk of electric shocks whilst using the bath is minimal, it’s the old basin and taps that were retained that presents a risk due to possible faults outside of the bathroom livening up the pipework to it and its taps.


    Andy B.
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  • 0
    A negative head single impeller shower pump to fill the new bath up with hot water before it goes cold and to over power the thermostatic mixing valve in the new mono block mixer tap.


    That is a pressure vessel sitting on top of it that helps it to know when someone has turned the hot tap on.


    Once again it will be plastic pipework from the new isolating valves to the mono block thermostatic mixer tap mounted in a fibreglass bath with a plastic waste pipe, the risk of electric shocks whilst using the bath is minimal, it’s the old basin and taps that were retained that presents a risk due to possible faults outside of the bathroom livening up the pipework to it and its taps.


    Andy B.
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