I must admit I am concerned by the introduction of AFDDs . There is no agreed means to test them and very little evidence that they actually do much to save lives. It is not like the RCD where the detail of how it works is very much public domain, there is a clear class of fault for which they reduce the danger and there are predefined tests and third party test kit so you can verify your chint RCD on your meggar tester.
I detect a product seeking a solution - where are the tables and graphs showing the big fall in the number of fires and electrocutions since they came in for the USA where they have now had them for a while ? I'm sure if they did anything, there would be evidence. Maybe like our own part P, there isn't any technical justifiaction, it just feels good, and that is the direction of the politics.
I know Paul Skyme was involved in a project to to and look at one E5 youtube video and certainly if you have an installation with a micrometer controlled contact gap in it, the eaton AFDD will find it. While this is some fascinating engineering, I'm not convinced that it is a realistic representation of any kind of fault found in real life.
I must admit I am concerned by the introduction of AFDDs . There is no agreed means to test them and very little evidence that they actually do much to save lives. It is not like the RCD where the detail of how it works is very much public domain, there is a clear class of fault for which they reduce the danger and there are predefined tests and third party test kit so you can verify your chint RCD on your meggar tester.
I detect a product seeking a solution - where are the tables and graphs showing the big fall in the number of fires and electrocutions since they came in for the USA where they have now had them for a while ? I'm sure if they did anything, there would be evidence. Maybe like our own part P, there isn't any technical justifiaction, it just feels good, and that is the direction of the politics.
I know Paul Skyme was involved in a project to to and look at one E5 youtube video and certainly if you have an installation with a micrometer controlled contact gap in it, the eaton AFDD will find it. While this is some fascinating engineering, I'm not convinced that it is a realistic representation of any kind of fault found in real life.
