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Cables and reaction to fire

Why do you suppose that the MHCLG did not feel it necessary to mandate levels of performance for cables with respect to their reaction to fire as was their prerogative under CPR?

Clearly the current non-prescriptive approach is either working or there is no significant evidence that cables and wiring systems have unduly contributed to the propagation of a fire or resulted in emissions that made a situation untenable when it would not have otherwise been. 

Further, what does it actually mean in the note in 422.2.1 that cables need to satisfy the requirements of the CPR in terms of their reaction to fire? I can find nothing specific in the CPR other than the need for CE marking and the requirements placed on the manufacturers for technical information.
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  • Former Community Member
    0 Former Community Member

    Chris Pearson:




     




    Ignoring an alarm wouldn't have gone down well in a military establishment where we had role calls so nobody could pretend not to have heard.

    Sure - you have a well trained population used to giving (and receiving) instruction and a structure that can enforce and reinforce procedures - bit like a school or hospital. It's the ill disciplined civpop that cause the problems


    One slight snag was the sound-proofed audiology enclosures which were so good that the alarms could not be heard. That simply required somebody else to go and open the door - no use knocking! ?

    If they are anything like the audiology booths in medical facilities, we used a flashing red light inside the booth. Similar for soundproofed and or EMC screened enclosures so our lady in Beijing can chat to Whitehall (or they have a window from which you can see the beacon outside, if you want to avoid taking what is potentially a black probe into the red (or blue) zone.


    To be honest I don't know what the routine is in classified areas - you wouldn't normally even leave your desk if highly sensitive materials were in use. But there will be a risk analysis somewhere.

    Sure - alarms don't usually mean automatic immediate evac - there will be investigation delays, zoned or phased evacuation depending on the location within the establishment or displacement to secure and fire sterile refuge areas (just remember to "Windows" and L on the PC ? - or more probably remove the brick and stick it in a Manifoil Mark IV) - but as you say, it will be a well developed procedure adopted by trained and disciplined people - if you don't follow the rules, it will be an interview without coffee


     




     

    regards


    OMS
Reply
  • Former Community Member
    0 Former Community Member

    Chris Pearson:




     




    Ignoring an alarm wouldn't have gone down well in a military establishment where we had role calls so nobody could pretend not to have heard.

    Sure - you have a well trained population used to giving (and receiving) instruction and a structure that can enforce and reinforce procedures - bit like a school or hospital. It's the ill disciplined civpop that cause the problems


    One slight snag was the sound-proofed audiology enclosures which were so good that the alarms could not be heard. That simply required somebody else to go and open the door - no use knocking! ?

    If they are anything like the audiology booths in medical facilities, we used a flashing red light inside the booth. Similar for soundproofed and or EMC screened enclosures so our lady in Beijing can chat to Whitehall (or they have a window from which you can see the beacon outside, if you want to avoid taking what is potentially a black probe into the red (or blue) zone.


    To be honest I don't know what the routine is in classified areas - you wouldn't normally even leave your desk if highly sensitive materials were in use. But there will be a risk analysis somewhere.

    Sure - alarms don't usually mean automatic immediate evac - there will be investigation delays, zoned or phased evacuation depending on the location within the establishment or displacement to secure and fire sterile refuge areas (just remember to "Windows" and L on the PC ? - or more probably remove the brick and stick it in a Manifoil Mark IV) - but as you say, it will be a well developed procedure adopted by trained and disciplined people - if you don't follow the rules, it will be an interview without coffee


     




     

    regards


    OMS
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