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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
Parents
  • 0
    Here at Kelly towers when the SEB installed our new RCD consumer unit the bloke said he needed to check the earthing in the bathroom  he ran a bit of green/yellow from the radiator to be he cold pipe then to the hot pipe  then up through the cavity wall to the back of the shower switch which was now bulging with earthing wires the whole lot is then connected to the main house earth by a ten mill earth lead and thru the shower supply cable does this sound about right?  Also up until a few years ago I used to take a mains radio in to the bathroom and on a few occasions I oticed that when the metal chain of the bath plug touched the taps the radio would crackle running the water and getting the chain and overflow it was attached to wet stopped he crackle I tried o measure between taps and chain but could see no voltage ther thoughts please. I don't know if it makes a difference but the AM station I was listening to was quite weak
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  • 0
    Here at Kelly towers when the SEB installed our new RCD consumer unit the bloke said he needed to check the earthing in the bathroom  he ran a bit of green/yellow from the radiator to be he cold pipe then to the hot pipe  then up through the cavity wall to the back of the shower switch which was now bulging with earthing wires the whole lot is then connected to the main house earth by a ten mill earth lead and thru the shower supply cable does this sound about right?  Also up until a few years ago I used to take a mains radio in to the bathroom and on a few occasions I oticed that when the metal chain of the bath plug touched the taps the radio would crackle running the water and getting the chain and overflow it was attached to wet stopped he crackle I tried o measure between taps and chain but could see no voltage ther thoughts please. I don't know if it makes a difference but the AM station I was listening to was quite weak
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