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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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    it’s down to the resistance of the carpet and all the other things we stand on to limit the current?

    Usually not the carpet - any vaguely modern building will either have a suspended floor or if solid have a damp proof membrane under it - which is conveniently insulating (electrically) and generally well protected from damage.


    The is a greater risk for solid floors without a damp proof membrane - think the old victorian quarry tiled floor in sculleries and the like - or shower blocks at camp sites. Many DNOs will recommend against or plain refuse PME to such installations.


      - Andy.
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  • 0
    it’s down to the resistance of the carpet and all the other things we stand on to limit the current?

    Usually not the carpet - any vaguely modern building will either have a suspended floor or if solid have a damp proof membrane under it - which is conveniently insulating (electrically) and generally well protected from damage.


    The is a greater risk for solid floors without a damp proof membrane - think the old victorian quarry tiled floor in sculleries and the like - or shower blocks at camp sites. Many DNOs will recommend against or plain refuse PME to such installations.


      - Andy.
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