ANSI/ISA-60079-18 (12.23.01)-2009 Electrical Apparatus for Use in Class I, Zone 1 Hazardous (Classified) Locations: Type of Protection - Encapsulation m

An American National Standard. Instrumentation Systems, and Automation Society (ISA). Second Edition. Supersedes ANSI/ISA-60079-18 (12.23.01)-2005 50p. This part of standard gives the specific requirements for the construction, testing, and marking of electrical apparatus, parts of electrical apparatus and Ex components with the type of protection encapsulation m.
This part of standard only applies for encapsulated electrical apparatus, encapsulated parts of electrical apparatus and encapsulated Ex components (hereinafter always referred to as m apparatus) where the rated voltage does not exceed 10 kV with a relative tolerance of +10 %.