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Residential Sprinkler Pump Protection

Former Community Member
Former Community Member
The British Standard for domestic sprinklers stipulates where a pump is required to boost the water pressure circuit breakers are not to be used for protection. On commercial installations we would have previously used a lockable red enclosure with main switch and MCB. Does anyone have any ideas on suitable solutions for the domestic sprinkler scenarios using a cartridge fuse or similar?
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    Others here will know better than me - but certainly the requirement for fuses rather than MCBs on fire safety circuits is a common one.


    The solution will depends somewhat on the size of circuit - some manufacturers offer MCB-sized HBC fuse carriers which you could probably swap the MCB for - which might do you up to about 32A. Above that they tend to be supplied as ready assembled switch-fuses (sometimes with a DIN-rail mounted fuse holder - often 1.5 or 2 'modules' wide, sometimes something more bespoke). Larger DIN-rail fuse carriers are available separately, but you then tend to run into BS EN 61439  issues about becoming an assembly manufacturer and having to type test the completed assembly etc.


       - Andy.

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  • 0
    Others here will know better than me - but certainly the requirement for fuses rather than MCBs on fire safety circuits is a common one.


    The solution will depends somewhat on the size of circuit - some manufacturers offer MCB-sized HBC fuse carriers which you could probably swap the MCB for - which might do you up to about 32A. Above that they tend to be supplied as ready assembled switch-fuses (sometimes with a DIN-rail mounted fuse holder - often 1.5 or 2 'modules' wide, sometimes something more bespoke). Larger DIN-rail fuse carriers are available separately, but you then tend to run into BS EN 61439  issues about becoming an assembly manufacturer and having to type test the completed assembly etc.


       - Andy.

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