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AFDDs AMD 2

John Peckham
In response to the suggestion of separate threads for individual changes to the 18th I thought I would start this one for AFDDs.


So what are the forum members views on the new requirement for AFDDs?


What is the safety case for the change? E.g impact on public safety, fires etc.Evidence?


What is the impact on the installation industry? How easy to fit, cost advantages disadvantages etc?


Will you feedback to the BSI on the changes and what will you say?


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    I have just had an interesting case today. I have just changed the RCD in a CU because it failed. The CU was of Steeple brand, somewhat old. An RCD of this brand is unobtainable, so I fitted one of Hager make which is mechanically interchangeable. Some will shout about not using different brands in type-tested assemblies but will be unable to say why this matters to the RCD. However, imagine this was after amendment 2. The cost to the customer would probably be around £3k for a new CU with all the bells and whistles which are now required! Is this reasonable? Clearly the answer is no. 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. Would that ever happen? Never.
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    I have just had an interesting case today. I have just changed the RCD in a CU because it failed. The CU was of Steeple brand, somewhat old. An RCD of this brand is unobtainable, so I fitted one of Hager make which is mechanically interchangeable. Some will shout about not using different brands in type-tested assemblies but will be unable to say why this matters to the RCD. However, imagine this was after amendment 2. The cost to the customer would probably be around £3k for a new CU with all the bells and whistles which are now required! Is this reasonable? Clearly the answer is no. 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. Would that ever happen? Never.
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