Sch 1 para 31 Requirements applicable to equipment in category M 2 of equipment-group I
(1) Equipment must be equipped with means of protection ensuring that sources of ignition do not become active during normal operation, even under more severe operating conditions, in particular those arising from rough handling and changing environmental conditions. (2) The equipment must be de-energised in the event of an explosive atmosphere. (3) Equipment must be so designed that the opening of equipment parts which may be sources of ignition is possible only under non-active conditions or via appropriate interlocking systems. Where it is not possible to render equipment non-active, the manufacturer must affix a warning label to the opening part of the equipment. (4) The requirements regarding explosion hazards arising from dust applicable to equipment category M 1 must be applied.