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Outside my scope of expertise then
Discuss Zdb before dead tests. in the UK Electrical Forum area at ElectriciansForums.net
Your wordsOutside my scope of expertise then
How does that work say for a garden shed that you intend to TT?As westward points out it is the Zs of the distribution circuit. There is no BS7671-defined term "Zdb" so I would agree that it shouldn't be used.
Or Impedance at the DB Or more sensibly Zdb, what on earth is the argument for, after all it may not be a regulation but Z db makes sense to meI think common sense is called for here. ............. its distinctly lacking in BS 7671
If you refer to a Zs - its the end of a circuit
If you refer to a Zbd - its obvious its at a sub board
So maybe it should be called a ZeZdb
No Zs.I think common sense is called for here. ............. its distinctly lacking in BS 7671
If you refer to a Zs - its the end of a circuit
If you refer to a Zbd - its obvious its at a sub board
So maybe it should be called a ZeZdb
Any ideas too many Zds now.How does that work say for a garden shed that you intend to TT?
Yes, with main earth conductor in situ , plus all parallel paths connected.I agree but not a abbreviation I ever quote. I believe it has been adopted where a true value of Ze cannot be established due to operational restrictions and the value is often referred to as Zdb which although often quoted is not a recognised abbreviation.
Yes, with main earth conductor in situ , plus all parallel paths connected.I agree but not a abbreviation I ever quote. I believe it has been adopted where a true value of Ze cannot be established due to operational restrictions and the value is often referred to as Zdb which although often quoted is not a recognised abbreviation.
You will have a Zs for that distribution circuit, and the Zs for the final circuits fed from it will have no correlation with that (ignoring the fact that the phase (or line as it is called now) is common).How does that work say for a garden shed that you intend to TT?
What will be the Ze/Zs at the board?You will have a Zs for that distribution circuit, and the Zs for the final circuits fed from it will have no correlation with that (ignoring the fact that the phase (or line as it is called now) is common).
The Zs at the DB will obviously be via the spike. I really get the feeling you're overcomplicating this. I see no merit in a made-up term "Zdb" - Zs covers everything perfectly.What will be the Ze/Zs at the board?
Reply to Zdb before dead tests. in the UK Electrical Forum area at ElectriciansForums.net
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