Insulation fault. Device(s) to continuously monitoring the insulation earth shall be installed for both insulated and earthed distribution systems.
An audible and visual alarm shall be given at a manned position in the event of an abnormally low level of insulation resistance and or high level of leakage current.
Electrical equipment and wiring are in general not to be installed in hazardous areas.
Where essential for operational purposes, arrangement of electrical installations in hazardous areas are to the satisfaction of the administrations.
Electrical Installations
Area classification is a method of analyzing and classifying the areas where explosive gas atmospheres may occur.
The object of the classification is to allow the selection of electrical apparatus able to be operated safely in these areas.
In order to facilitate the selection of appropriate electrical apparatus an the design of suitable electrical installations, hazardous areas are divided into zones 0, 1 and 2 according to the principles of the standards of International Electro-technical Commission(IEC).
