BS5839-1:2013 states that zone plans are required on every system of any size, and should also be noted as a major non-compliance during routine maintenance, when they are not displayed on existing installations.
What must be on the zone plan?
The zone plan must be a clear, accurate representation of the building clearly showing the division into fire alarm zones.
The drawing of the building layout should clearly show final exits, common escape routes, circulation areas and stairs. A ‘block’ diagram which doesn’t show this information is not acceptable.
You must indicate a ‘You Are Here’ point on your zone plan, so the user can locate where they are in relation to the zone in alarm.
The zone plans should be mounted by each CIE point, which are all the fire alarm control panels and repeater panels.