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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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    Hi Thomas.


    I think you would be better off putting in a comprehensive fire detection system, sprinklers, or both.  Using "LSZH" type cables rather than PVC insulated will also be a benefit for two reasons, a) less smoke and acidic gas produced during a fire, and b) XLPE insulated conductors will dramatically reduce (in theory to zero) the chance of arcing occurring within damaged cables.


    AFDDs, in my view, are not a panacea that some might have you believe, and they will not detect ohmic heating type faults (which probably account for most electrically started fires).


    I can provide you some research work (yet unpublished) if you PM me with your details.  It might be interesting to you.
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  • 0
    Hi Thomas.


    I think you would be better off putting in a comprehensive fire detection system, sprinklers, or both.  Using "LSZH" type cables rather than PVC insulated will also be a benefit for two reasons, a) less smoke and acidic gas produced during a fire, and b) XLPE insulated conductors will dramatically reduce (in theory to zero) the chance of arcing occurring within damaged cables.


    AFDDs, in my view, are not a panacea that some might have you believe, and they will not detect ohmic heating type faults (which probably account for most electrically started fires).


    I can provide you some research work (yet unpublished) if you PM me with your details.  It might be interesting to you.
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