EN 61000-3-11 and EN 61000-3-12

Apart from being a low reading 0.031776Ω is particularly precise. 

Which is rather frustrating, because we don't know whether that's based on 240 V or 230 V (or even C_max times either of those, i.e. 253 V or 264 V) ... which of course has a huge impact, i.e. is the prospective fault current we're looking at 8.3 kA or 7.2 kA ???

gkenyon said:

we don't know whether that's based on 240 V or 230 V (or even C_max times either of those, i.e. 253 V or 264 V) ... which of course has a huge impact, i.e. is the prospective fault current we're looking at 8.3 kA or 7.2 kA ???

I'm not sure it matters - whether it's 7kA or 9kA it's still well beyond what probably 99.9% of domestic supplies could offer. They seem to have come up with a standard that makes items that comply with it practically useless. Another BS 7288?

    - Andy.

gkenyon said:

we don't know whether that's based on 240 V or 230 V (or even C_max times either of those, i.e. 253 V or 264 V) ... which of course has a huge impact, i.e. is the prospective fault current we're looking at 8.3 kA or 7.2 kA ???

I'm not sure it matters - whether it's 7kA or 9kA it's still well beyond what probably 99.9% of domestic supplies could offer. They seem to have come up with a standard that makes items that comply with it practically useless. Another BS 7288?

    - Andy.