Installing electrics/pump switch-gear in protected staircases.

[p10164]

Hi, I wonder if anyone can advise me.  My work is having a switch gear/electrics for a sump pump moved from a garage which is being demolished in to a protected stairwell which is used for emergency evacuations.  The electrics will be in a 30mins fire resistant casing but is this sufficient or even allowed?  The staircase accomodates 4 floors although it is not the main staircase in to/out of the building.  There is automatic detection but this is at the top on the 3rd floor.

Any help and advice would be much appreciated.

Thanks
Paul