Electrical apparatus for potentially explosive atmospheres. Group I. Intrinsically safe systems - Construction and testing not-for-sale IEC 60050(161):1990

IEC 60050(161):1990

The requirements for PSL-1 form the basis of BS EN ISO 11961

marking and information supplied by the manufacturer to reduce the risk of injuries to both third parties and the user during their normal use

BS 1635 describes a rationale of symbolism that establishes rules for the design of symbols and other graphic conventions and gives recommendations for the application of those rules and the ways in which symbolism should be used

Annex A (normative) Criteria for the assessment of stair suitability

Electrical apparatus for potentially explosive atmospheres. Group I. Intrinsically safe systems - Construction and testing not-for-sale IEC 60050(161):1990