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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

  • UKPN:

    Working on the basis that various posters don't know the difference between bonding and earthing, I would go for bonding the bath. Take a 4mm back to the airing cupboard. Then you will sleep at night. If you take any notice of the 18th guide book you won't bond anything. (Although it's been saying bond everything for 50 years) 




    Are you one of those DNO guys refusing to connect new electricity supplies to houses back in the 1980’s because the metal waste fitting mounted in the plastic bath to connect it to the plastic waste pipe didn’t have a green and yellow wire connected to it?


    How far are you going to go when it comes to installing equipotential bonding in bath and shower rooms? I was in a new house in the 1980’s when the connection of a new supply was refused, because the plastic shower tray had a metal waste connected to a plastic waste pipe that was not bonded.


    Andy B

Reply

  • UKPN:

    Working on the basis that various posters don't know the difference between bonding and earthing, I would go for bonding the bath. Take a 4mm back to the airing cupboard. Then you will sleep at night. If you take any notice of the 18th guide book you won't bond anything. (Although it's been saying bond everything for 50 years) 




    Are you one of those DNO guys refusing to connect new electricity supplies to houses back in the 1980’s because the metal waste fitting mounted in the plastic bath to connect it to the plastic waste pipe didn’t have a green and yellow wire connected to it?


    How far are you going to go when it comes to installing equipotential bonding in bath and shower rooms? I was in a new house in the 1980’s when the connection of a new supply was refused, because the plastic shower tray had a metal waste connected to a plastic waste pipe that was not bonded.


    Andy B

Children
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