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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
    Extract below from BS 5839-1:2017 [my emphasis], clause 25.2 Recommendations for mains power supplies:


    " i)  The circuit supplying the fire detection and fire alarm system should not be protected by a residual current device unless this is necessary to conform to BS 7671. "


    Unless using a fire rated BS 8436 compliant cable, running the non-BS 8436 fire rated cable in metallic conduit or running it surface mounted - RCD protection would be required unless the buried depth can somehow be increased to greater than 50mm (double sheet that wall?).


    Happy to be corrected but personally I can't see that there's all that much wiggle room on the above.


    I would state that I too would try and keep the circuit RCD-free, but to do so I'd be using one of the above methods - preference being concealed galvanised conduit drop from above.


    P

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  • 0
    Extract below from BS 5839-1:2017 [my emphasis], clause 25.2 Recommendations for mains power supplies:


    " i)  The circuit supplying the fire detection and fire alarm system should not be protected by a residual current device unless this is necessary to conform to BS 7671. "


    Unless using a fire rated BS 8436 compliant cable, running the non-BS 8436 fire rated cable in metallic conduit or running it surface mounted - RCD protection would be required unless the buried depth can somehow be increased to greater than 50mm (double sheet that wall?).


    Happy to be corrected but personally I can't see that there's all that much wiggle room on the above.


    I would state that I too would try and keep the circuit RCD-free, but to do so I'd be using one of the above methods - preference being concealed galvanised conduit drop from above.


    P

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