This Malaysian Standard specifies requirements for the construction, testing and marking of electrical equipment, parts of electrical equipment and Ex components in the type of protection powder filling "q", intended for use in explosive gas atmospheres.
NOTE 1: Electrical equipment and Ex components protected by powder filling “q” may contain electronic circuits, transformers, protection fuses, relays, intrinsically safe electrical apparatus, associated electrical apparatus, switches, etc.
NOTE 2: Type of protection powder filling “q” provides equipment protection level (EPL) Gb.
This Malaysian Standard supplements and modifies the general requirements of MS IEC 60079-0. Where a requirement of this standard conflicts with a requirement of MS IEC 60079-0, the requirement of this standard will take precedence.