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AFDD performance standards, installation for a timber framed new build

Sizzles
Hi,


I'm building a house based on a SIPS timber frame, and I'm going through the process of designing the wiring.  I'll be installing the electrics myself and have someone to certify the work.


I have been considering the electrical design for the building and looking at AFDD as a means of providing additional protection. Watching some of the testing videos done by John Ward on YouTube I note that different devices from manufacturers seem to behave very inconsistently. 


Given the large investment (~ £150 per device) I'd be interested to hear the forums opinions on the quality standards in force. I was quite happy to invest in these devices at first, but I'm not convinced that the quality between manufacturers is nearly good enough.


Tom
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    Granted that much domestic design is probably done on the hoof and by rule of thumb, but there must be a reason why design (C&G 2396) is at level 4, but installation and initial verification is at level 3 (C&G 2391).
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    Granted that much domestic design is probably done on the hoof and by rule of thumb, but there must be a reason why design (C&G 2396) is at level 4, but installation and initial verification is at level 3 (C&G 2391).
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