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Bonding a metal bath

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
Parents
  • Assuming your bath is upstairs and not in the garden.


    The old bath was not bonded - it was earthed ensuring you would get the maximum shock had you touched it at the same time as a live wire or appliance.


    As your new bath is not connected to anything electrical or to any metal which is connected to anything electrical you must not earth it (bond it unnecessarily).

    Think of it as a metal door handle or a metal knife and fork. It cannot become live nor provide a path to earth.


    Nothing to do with the 18th or any other edition.
Reply
  • Assuming your bath is upstairs and not in the garden.


    The old bath was not bonded - it was earthed ensuring you would get the maximum shock had you touched it at the same time as a live wire or appliance.


    As your new bath is not connected to anything electrical or to any metal which is connected to anything electrical you must not earth it (bond it unnecessarily).

    Think of it as a metal door handle or a metal knife and fork. It cannot become live nor provide a path to earth.


    Nothing to do with the 18th or any other edition.
Children
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