This standard specifies the requirements for the construction and testing of oil - immersed electrical equipment, oil -immersed parts of electrical equipment and Ex components in the type of protection oil immersion "o", intended for use in explosive gas atmospheres.

NOTE Type of protection oil immersion "o" provides equipment protection level (EPL) Gb. For further information, see Annex A.

This standard supplements and modifies the general requirements of ANSI/ISA-60079-0 Where a requirement of this standard conflicts with a requirement of ANSI/ISA-60079-0 the requirement of this standard takes precedence.

This standard is applicable to electrical equipment, parts of electrical equipment, and Ex components which, in the absence of oil immersion, are not ignition capable in normal operation as determined by ANSI/ISA-60079-15 or ANSI/ISA-60079-11