"Whatever" - but you know exactly what I mean!That's not Utopia. Utopia would be if we had intelligent electrical installations which varied depending on the kind of faults encountered.
Kind Regards, John
"Whatever" - but you know exactly what I mean!That's not Utopia. Utopia would be if we had intelligent electrical installations which varied depending on the kind of faults encountered.
Yes, it's that simple when (as in most cases) it is clear which of these two 'jobs' is being done.Bonding and earthing do completely different jobs. That's why they have different names.... earthing is installed to clear faults.
Bonding is installed to keep potential differences to a minimum.
You need to forget everything you think you know and all these mad hypothetical scenarios which get bandied about on here by the forum wafflers. It really is that simple.
You appear to be poaching on someone else's territoryIt is very important that people are educated t use correct terminology. There you are John!
In as much as it unavoidably also 'bonds', 'earthing' presumably should achieve both of those things - i.e. a limited touch voltage for a limited duration. Another demonstration, I suppose, of the duality of those two functionalities!Earthing limits duration of touch voltages, bonding limits the value of them.
Someone on this forum used to use that as their signature.Earthing limits duration of touch voltages, bonding limits the value of them.
In practical terms, what matters is whether there is any credible scope for doubt about meaning. If there is doubt, then clarification must be sought ....I really object to this attitude that mistakes or gaps in knowledge should not be corrected (and knowledge improved) in case it confuse someone. The idea that "We know what they really mean so what does it matter?" is dangerous and may not be correct in some instances. ...
Good example. In that case there was absolutely no doubt what the OP meant, and he even knew the correct terminology. The title he gave to his thread related to "gas supply bonding", he was talking about a required connection to the incoming gas supply pipe and, although he did use the phrase 'earth cable' at least once in the posts, he never talked, or asked, about an "earthing conductor". We therefore all knew exactly what was being talked about, and that it was something that had never been notifiable.Only today, by coincidence, we had a poster asking if installing earthing conductors was notifiable. Before the relaxing of the requirements it was. However he was talking about bonding which never has been notifiable.
The mistake I always hate is people calling CUs "fuse boxes" and breakers "fuses". Fuses and MCBs have different characteristics.I really object to this attitude that mistakes or gaps in knowledge should not be corrected (and knowledge improved) in case it confuse someone.
The idea that "We know what they really mean so what does it matter?" is dangerous and may not be correct in some instances.
No, it isn't. It's no different than calling you Dave.In practical terms, what matters is whether there is any credible scope for doubt about meaning.I really object to this attitude that mistakes or gaps in knowledge should not be corrected (and knowledge improved) in case it confuse someone. The idea that "We know what they really mean so what does it matter?" is dangerous and may not be correct in some instances. ...
It should be sought first, just in case.If there is doubt, then clarification must be sought ....
We did but he didn't.Good example. In that case there was absolutely no doubt what the OP meant, and he even knew the correct terminology. The title he gave to his thread related to "gas supply bonding", he was talking about a required connection to the incoming gas supply pipe and, although he did use the phrase 'earth cable' at least once in the posts, he never talked, or asked, about an "earthing conductor". We therefore all knew exactly what was being talked about, and that it was something that had never been notifiable.Only today, by coincidence, we had a poster asking if installing earthing conductors was notifiable. Before the relaxing of the requirements it was. However he was talking about bonding which never has been notifiable.
It wouldn't need to be in every house in order to provide protection in one particular house. It would require the reference earth electrode to be located completely outside the influence of other earth electrodes (including bonded pipework etc.), but so long as that were done it would adequately monitor for failure of the supply neutral. Given that in normal use the neutral shouldn't rise more than few volts above earth potential, it could be made considerably more sensitive, perhaps tripping on as little as 10V. Of course, it would either have to open the incoming neutral ahead of the N-E link, or be provided with a separate switching pole for the earth connection to the neutral, either of which would introduce another potential failure point.However I would think you could use something like the old ELCB-v if you wanted to disconnect the supply should the supply earth become 50 volt away from the earth electrode, but it would need to be installed in every house to ensure the DNO supply did not have a earth to real earth voltage over 50 volt.
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