Describes construction and testing of intrinsically safe electrical apparatus, protection 'i', for use in potentially explosive atmospheres and covers, electrical apparatus, delay times, plastics and light alloy enclosures, access to uninsulated live parts, special fasteners, interlocking devices, bushings, materials used for cementing, connections, terminal compartments, cable and conduit entries, specific electrical apparatus, impact tests, rubbing parts, torque tests for bushings and thermal tests and Insulation resistance. Applies also to apparatus located outside the potentially explosive atmosphere or protected differently.

BS EN 50020 : 2002

NFC 23 520 : 98 PR - Identical

EN 50020 : 2002 - Corresponds

NFC 23 520 : 98 PR - Identical

IEC 60079-11 : 6.0 - Similar to