Provisions for escape lighting by purpose group

Table 2.9 Provisions for escape lighting Purpose Group 2: All common escape routes (including external escape routes) Purpose Groups 3, 4(2), 6 and 7(a): (a) Underground or windowless accommodation (b) Stairways in a central core or serving storey(s) more than 18 m above ground level (c) Internal corridors more than 30 m long (d) Open-plan areas more than 60 m2 Purpose Groups 4(3) and 7(b): All escape routes (including external escape routes) except in a shop of not more than three storeys, with no sales floor greater than 280 m2, provided that the shop is not a restaurant or bar Purpose Group 5: All escape routes (including external escape routes) and accommodation except for– (a) accommodation open on one side to view sport or entertainment during daylight hours; and (b) parts of school buildings with natural light and used only during normal school hours All purpose groups: (a) All toilet accommodation having a floor area more than 8 m2 (b) Windowless toilet accommodation having a floor area not more than 8 m2 (c) Electricity generator rooms (d) Switch room/battery room for emergency lighting system (e) Emergency control room