Bonding

Discussion in 'Electricians' Talk' started by Ron12, Jun 11, 2020.

  1. Bob Rathbone

    Bob Rathbone Screwfix Select

    The vigorous discussion on this subject of to bond or not to bond (sorry Will), highlights the shortcomings of bonding. Bonding works only when full equipotential bonding is carried out, all of the exposed metalwork and the re bar in the floor are good places to bond. This will ensure that the Faraday cage around the users is complete, then and only then will the full benefits of equipotential bonding be realised. Now for the shortcomings. The main weakness of the bonding regime is brought into focus at the point where the user of the installation transitions from the protected bonded area, to the non bonded area, such as outdoors. It is at this transition point that a potential difference may exist between true earth, outside and the false earth inside created by the bonding system. The outside tap plumbed in copper and outside buildings or hot tubs are common examples of this transition weakness of the bonding system. The regulations tell us only a small part of bonding, they do not consider controlling the step voltage gradient at the transition, for this you need to see the systems used for high voltage sub station metal fences to fully appreciate the need for step voltage control.
     
  2. Hfs

    Hfs Screwfix Select


    Hahaha unbelievable!
     
  3. Ron12

    Ron12 Member

    In your opinion... maybe
     
  4. unphased

    unphased Screwfix Select

    Ron, stick to plumbing, mate. Don't interfere with bonding requirements until you've understood it, which could be never. o_O
     
  5. Ron12

    Ron12 Member

    No it is not, I have a duty of care to customers and while every electrician has a different way of doing things... You have shared no valuable input. I have seen your posts regarding another member of the site. If you think that an unbonded metal pipe coming in from outside’ where it can easily transfer into human contact’ when it becomes live is perfectly satisfactory then you are wrong. This could potentially be classed as dangerous in an electrical inspection if the home owner was to rent/ sell the property
     

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