METHODS OF EXPLOSION PROTECTION
Method Type of Protection
Designed to prevent any means of ignition arising Ex e Increased Safety
Ex n or Ex N Non Sparking
Designed to limit the ignition energy of the circuit Ex I Intrinsic Safety
Designed to prevent the flammable mixture reaching Ex m Encapsulation
a means of ignition Ex p Pressurisation
Ex o Oil Immersion
Ex nR or Ex N Restricted Breathing
Designed to prevent any ignition from spreading Ex d Flameproof Enclosure
Ex q Powder Filling
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