Sch 1 para 2 Principles of integrated explosion safety
(1) Equipment and protective systems intended for use in potentially explosive atmospheres must be designed from the point of view of integrated explosion safety. (2) In this connection, the manufacturer must take measures— (a) above all, if possible, to prevent the formation of explosive atmospheres which may be produced or released by equipment and by protective systems themselves; (b) to prevent the ignition of explosive atmospheres, taking into account the nature of every electrical and non-electrical source of ignition; (c) should an explosion nevertheless occur which could directly or indirectly endanger persons and, as the case may be, domestic animals or property, to halt the explosion immediately or to limit the range of explosion flames and explosion pressures to a sufficient level of safety, or both. (3) Equipment and protective systems must be designed and manufactured after due analysis of possible operating faults in order as far as possible to preclude dangerous situations. (4) Any misuse which can reasonably be anticipated must be taken into account.