SCHEDULE 1 ESSENTIAL HEALTH AND SAFETY REQUIREMENTS

SUPPLEMENTARY REQUIREMENTS IN RESPECT OF EQUIPMENT

Requirements applicable to equipment in category 3 of equipment-group II

37 Explosive atmospheres caused by air and dust mixtures
(1) Equipment shall be so designed and constructed that air and dust mixtures cannot be ignited by foreseeable ignition sources likely to exist during normal operation.
(2) With regard to surface temperatures, sub-paragraph 33(5) applies.
(3) Equipment, including cable entries and connecting pieces, shall be so constructed that, taking into account the size of its particles, dust can neither develop explosive mixtures with air nor form dangerous accumulations inside the equipment.