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Testing if supplementary bonding is required.

MrJack96
I have read some bits stating we can measure between the two metallic parts in question and referring to the formula 


50/ia will give you the resistance needed to keep touch voltage to less than 50v 


my questions can we do the same test to determine if the part has a high enough resistance to not require bonding and what sort of figures we should look for?
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    So I’m just going to quote “zones” just for the purpose of this topic. 


    the zone with the increased extent of plastic service pipes leads to these zones being less than perfect from the equipotential side of things so am I right in thinking in within these zones we can still see in a TT system 240v to the ground within an installation it’s just a case of the RCD doing it’s job or if they fail it’s down to the resistance of the carpet and all the other things we stand on to limit the current?
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  • 0
    So I’m just going to quote “zones” just for the purpose of this topic. 


    the zone with the increased extent of plastic service pipes leads to these zones being less than perfect from the equipotential side of things so am I right in thinking in within these zones we can still see in a TT system 240v to the ground within an installation it’s just a case of the RCD doing it’s job or if they fail it’s down to the resistance of the carpet and all the other things we stand on to limit the current?
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