Standards Development

Scope

This part of IEC 60079 gives the specific methodology for the assessment and testing, and requirements for marking of Ex Equipment and Ex Components with special protection "s".

This part of IEC 60079 applies to

• electrical equipment employing alternative explosion protection methods not covered by any other existing document of the IEC 60079 series;

• electrical equipment employing one or more recognized Types of Protection (see recognized Type of Protection) where the design and construction of the equipment or parts of the equipment are not fully compliant with the documents of the IEC 60079 series; and

• electrical equipment where the intended use is outside the parameters of the scope of the documents of the IEC 60079 series.

This part of IEC 60079 is not intended for equipment that is covered by the scope of other IEC 60079 or ISO/IEC 80079 equipment standards unless

• it is clearly demonstrated that compliance with recognized Types of Protection is not feasible; and

• alternative explosion protection methods are applied to establish an equivalent Equipment Protection Level (EPL).

This part of IEC 60079 is applicable to Group I, Group II and Group III and for EPLs Ma, Mb, Ga, Gb, Gc, Da, Db and Dc, as defined in IEC 60079-0.

This document supplements and modifies the general requirements of IEC 60079-0. Where a requirement of this document conflicts with a requirement of IEC 60079-0, the requirement of this document takes precedence.