ANSI/ISA-60079-11 (12.02.01):2018

ANSI/ISA-60079-11 (12.02.01)-2018, Explosive Atmospheres – Part 11: Equipment protection by intrinsic safety “i” (Edition 6.2), focuses on the design and construction of electrical equipment intended for use in explosive atmospheres, specifically using intrinsic safety methods. This standard offers detailed requirements to limit energy within circuits so that sparks or heat cannot ignite hazardous gases or dust. It aligns international practices with US national deviations, covering everything from component ratings and enclosure specifications to testing procedures and documentation. It also offers special apparatus like diode safety barriers and Fieldbus Intrinsically Safe Concept (FISCO) systems, providing clear guidance on marking, installation and maintenance considerations. It assists engineers and designers working with instrumentation and control in potentially explosive environments to navigate complex safety challenges while following recognized industry practices.