156. Dangers of ignition (including lighting installation).
(a)No internal combustion engine, and no electric motor or other electric equipment capable of generating sparks or otherwise causing combustion shall be installed or used in a building or danger zone. Electric conductor shall be fitted with screwed steel conduit.(b)All hot exhaust pipes shall be installed outside a building and other hot pipes shall be suitable protected.(c)Portable electric hand lamps shall not be used unless of an intrinsically safe type, and portable electric tools connected by flexible wires shall not be used, unless of the flameproof type(d)Where on inflammable atmosphere may occur the soles of footwear worn by workers shall have no metal on them, and the wheels of trucks or conveyors shall be of conducting nonsparking materials. Adequate precautions shall be taken to prevent the ignition of explosive or inflammable substances by sparks emitted from locomotive or other vehicles operated in the factory or on public lines.(e)No electric arc lamp, or naked light, fixed or portable, shall be used, and no person shall have in his possession any match or any apparatus of any kind for producing a naked light or spark in or on, or about any part of the factory where there is liability to fire or explosion from inflammable gas, vapour or dust and all incandescent electric light in such parts shall be in double air tight glass covers.(f)Prominent notices in the language understood by the majority of the workers and legible by day and by night, prohibiting smoking, the use of naked lights, and the carrying of matches or any apparatus for producing a naked light or spark, shall be affixed at the entrance of every room or place where is the risk of fire or explosion from inflammable gas, vapour or dust. In the case of illiterate workers, the contents of the notice shall be fully and carefully explained to them when they commence work in the factory for the first time and again when they have completed one week at the factory.
