DSkelton
Incorrect Regulation 543.2
I disagree
Incorrect Page 157 BGB
I disagree
It's there to reestablish the equipotential zone, hence why its referred to in 701.415.2 as LOCAL SUPPLEMENTARY BONDING!
I disagree, the equipotential zone should already be there, it is there to supplement it
Example, Ze 0.02,Circuit to bathroom, 4mm twin earth, cpc 2.5, 25 meters long, Exposed conductive part and extraneous conductive part with the bathroom, whats the touch voltage?
50V?
Again, strange that, i assume you will be utilising 543.2
No, I'll be utilising the oxford english dictionary definition of supplementary
Completely wrong, take the bathroom example above, upon fault a voltage will appear on the exposed conductive part, if this is supplementary bonded to the extraneous part then the touch voltage will be dramatically reduced.
I disagree
Read 700 General BGB, page 197
The special locations in part 7 supplement or modify the general requirements
So we meet 415.2 as required and then we modify and supplement with the requirements of 701
And your point is?
If you don't know the answer to the touch voltage, its 135 volts, but that's okay it meets 50/Ia.
Huh, maximum touch voltage is 50V??? It is the maximum allowed fault voltage that could appear on exposed metal work if their were a earth fault on that circuit before the protective device operates.
That's why we apply LOCAL SUPPLEMENTARY BONDING!!
No, we apply it to SUPPLEMENT the existing main protective bonding.
There are a host of other issues, i'm not going into anymore, i suggest you speak to the IET because what you are suggesting may put lives at risk!!!
Haha, will it? Really? Funny that, because the IET seems to agree with me on this subject?!
Chris