Hi Folks, I've been watching the videos of John Ward as of late, on YouTube. His latest video struck me as strange, because I was not aware that AFDD's (AFCI's that our US members know so well), are now mandated in the latest change to the Regulations in the UK.
Here is a link to the video, where he tests one of these devices and gives his thoughts on it.
They're slowly spreading across Europe. Germany's had (and cursed) them for a few years, although I've gathered they're no longer required, only recommended. I'm quite curious about Austria's new regs, I'll hopefully get some info on them next week. The last thing I've read about AFDDs is that there isn't much evidence of advantages in fire safety over blanket RCD protection. Most of the data seem to be from the US where, as we all know, earth leakage protection of entire circuits is fairly uncommon.
Germany got a new national standard in 2016 requiring them for special places like laboratories, childcare, retirement homes, museums, public buildings with irreplaceable goods (like a historic library), wooden homes (which are the minority here), wood working businesses etc. The standard is applicable for new planning. There is no obligation to update existing buildings.
Of course we had discussions about the new standard only being implemented because the manufacturers want to sell afdds... I haven't had any experience yet and don't know about any nuisance tripping.
Last edited by andey; 02/12/1907:40 AM.
Re: AFDD's coming to the UK
#219955 02/14/1912:29 AM02/14/1912:29 AM
In the second video that JW posted, which I will link to below, he tried the over-voltage test (device is meant to trip @ 270VAC) and then there was the actual arc-fault trip test, where loose connections SHOULD cause the device to trip. The results are quite disappointing, especially from a company that I thought made quality electrical controls equipment.
They're coming to Austria as well... the new standard (OVE E-8101) is already published but not yet mandatory. They're required in sleeping quarters of nursing homes and kindergartens (essentially any building where the inhabitants are considered less likely to escape a fire, not that that makes much sense, no one is likely to survive a fire while asleep) and recommended for essentially the same building types as in Germany.