kfh:
Have a look at https://www.youtube.com/watch?v=L6ZXH2a_0Vs to see a Hagar AFDD not detecting an arc from about 4 mins in. The commentary is in French which I do not speak so it may be that their electricians are as skeptical about the effectiveness of AFDDs as many here.
Definitely not French - sounds more like Rumanian, which I certainly don't speak.
davezawadi (David Stone):
Imagine one needed a new engine in a car because a new timing belt was needed and we had this type testing nonsense in place.
More like specifying a new minimum diameter for tyres. If you are really lucky, you already have them in that size; but otherwise either you need to replace all four on one go, or worst case is buy a whole new car.
If a new circuit has to have AFDD, and if the device has to live in the CU, but won't fit, there is an element of the retrospective about this proposal. However, do they have to go in the CU, or could they be put in a separate enclosure? (I realize that if all AFDDs are combined with an MCB, the MCB will be doubled-up.)
So then we discussed the next stage. I pointed out that the deadline is 28 March 2022, 'cos after that, the brand new shiny CU is obsolete!
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