"This part of IEC 60079 contains specific 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"" can 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 or Mb. This standard supplements and modifies the general requirements of IEC 60079-0. Where a requirement of this standard conflicts with a requirement of IEC 60079-0@ the requirement of this standard takes precedence. This standard applies to electrical equipment@ parts of electrical equipment and Ex components with: ?C a rated supply current less than or equal to 16 A; ?C a rated supply voltage less than or equal to 1 000 V; ?C a rated power consumption less than or equal to 1 000 W."