EN 50020:1994

Electrical apparatus for potentially explosive atmospheres - Intrinsic safety 'i' EN 50020:1994

General information

99.60 Withdrawal effective   Jun 30, 2003

CENELEC

CLC/TC 31 Electrical apparatus for potentially explosive atmospheres

European Norm

Scope

This European Standard specifies the construction and testing of intrinsically safe apparatus, intended for use in potentially explosive atmospheres and for associated apparatus, which is intended for connection to intrinsically safe circuits which enter such atmospheres. This European Standard supplements EN 50014: 1992 Electrical apparatus for potentially explosive atmospheres - general requirements edition 1992, the requirements of which apply to intrinsically safe apparatus and to associated apparatus with some exceptions. If associated apparatus is protected by a type of protection listed in EN 50014 then the requirements of that method of protection together with the relevant Parts of EN 50014 also apply to the associated apparatus. The list of exclusions which follows is directly applicable to associated apparatus intended for use in situations where there is no potentially hazardous atmosphere and in other circumstances should be used in combination with the requirements of the other methods of protection. This standard is applicable to electrical apparatus in which the electrical circuits themselves are incapable of causing an explosion in the surrounding explosive atmosphere. This standard is also applicable to electrical apparatus or parts of electrical apparatus located outside the potentially explosive atmosphere or protected by another type of protection listed in EN 50014, where the intrinsic safety of the electrical circuits in the potentially explosive atmosphere may depend upon the design and construction of such electrical apparatus or parts of such electrical apparatus. The electrical circuits exposed to the potentially explosive atmosphere are evaluated for use in such an atmosphere by applying this standard. Note: methods of interconnection of intrinsically safe apparatus and associated apparatus are specified in EN 50039

Related legislation

Legislation related to this standard

79/196/EEC

Electrical apparatus for use in explosive atmospheres using certain modes of protection

Harmonized/Supporting
97/53/EC

Electrical apparatus for use in explosive atmospheres using certain modes of protection

Harmonized/Supporting

Life cycle

NOW

WITHDRAWN
EN 50020:1994
99.60 Withdrawal effective
Jun 30, 2003

CORRIGENDA / AMENDMENTS

WITHDRAWN
EN 50020:1994/corrigendum Feb. 1998

REVISED BY

WITHDRAWN
EN 50020:2002

Relations

Adopted from IEC 60079-11:1989 NOT_EQUIVALENT

Adopted from IEC 60079-3:1990 NOT_EQUIVALENT