A type of protection where precautions are TAKEN so that electrical equipment that has the potential to arc is not capable of igniting a surrounding explosive atmosphere. This can be further categorised as follows: Ex nA -Where COMPONENTS used in construction are non-sparking Ex nC -Where components used in construction are non-incendive Ex nR – Where components used are tightly enclosed to restrict the BREATHING and PREVENT ignition Ex nL -Where components used in construction do not contain ENOUGH energy to cause an ignition.

A type of protection where precautions are taken so that electrical equipment that has the potential to arc is not capable of igniting a surrounding explosive atmosphere. This can be further categorised as follows: Ex nA -Where components used in construction are non-sparking Ex nC -Where components used in construction are non-incendive Ex nR – Where components used are tightly enclosed to restrict the breathing and prevent ignition Ex nL -Where components used in construction do not contain enough energy to cause an ignition.