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Fire alarm panel supply

Apostolos
Good morning.

I have a question that may sound silly so excuse my ignorance in advance

I have a Fire Alarm Panel

This is going to be fed through FP200.

However the installation of the FP200 would need an RCD because it is chased within a stud wall less than 50mm from the surface.

Can I omit the RCD on the grounds that it is a critical system for the safety of people?

Is there anything like that in BS7671?

It seems really counter intuitive to use an RCD on a Fire Alarm Panel...

Thanks
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  • 0

    OMS:




    Apostolos Kasinalis:

    OMS, sorry I am not so advanced in my knowledge around the regulations.

    As I understand there is no provision in BS7671 to omit an RCD in case of a safety or a critical system. Am i right?

     




     

    It depends on what it's wired in, and how as discussed and described in several posts above.


    Personally speaking, I would use all of the available mechanisms to omit the RCD protection from a life safety system


    Regards


    OMS 

     




    I solved my issue temporarily bu adding on the drawing a note to the installers that says "Cable to FAP should be surface mounted or chashed in an earthed steel conduit"

    In this way the RCD is not needed by definition.

    However I am still looking at the answers to get a better understanding about the RCD (which ME TOO .... doesn't want to use on a FAP feeder) and a possible chased cable in a plastic conduit of dropped in a stud wall void behind the FAP....

    I remember seeing somewhere in the BS7671 that in hospitals for critical systems the RCD can be ommitted (don't remember where and what paragraph...) so I assumed that the same would apply to a FAP.

    And to be completely honest I will apply the same to a Refuge Alarm Panel which usually goes side by side with a FAP

Reply
  • 0

    OMS:




    Apostolos Kasinalis:

    OMS, sorry I am not so advanced in my knowledge around the regulations.

    As I understand there is no provision in BS7671 to omit an RCD in case of a safety or a critical system. Am i right?

     




     

    It depends on what it's wired in, and how as discussed and described in several posts above.


    Personally speaking, I would use all of the available mechanisms to omit the RCD protection from a life safety system


    Regards


    OMS 

     




    I solved my issue temporarily bu adding on the drawing a note to the installers that says "Cable to FAP should be surface mounted or chashed in an earthed steel conduit"

    In this way the RCD is not needed by definition.

    However I am still looking at the answers to get a better understanding about the RCD (which ME TOO .... doesn't want to use on a FAP feeder) and a possible chased cable in a plastic conduit of dropped in a stud wall void behind the FAP....

    I remember seeing somewhere in the BS7671 that in hospitals for critical systems the RCD can be ommitted (don't remember where and what paragraph...) so I assumed that the same would apply to a FAP.

    And to be completely honest I will apply the same to a Refuge Alarm Panel which usually goes side by side with a FAP

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