« Back to Glossary Index

Code used to identify “intrinsic safety” to IEC 60079-11 when capable of remaining safewith two countable faults applied . Similarly, EEx ia to EN50 020/39, and AEx ia to FM 3610 (based on ISA 12.02.01). Intrinsic safety to category “ia” is the only method of protection permitted in Zone 0 (plus Zones 1 & 2 by default).

« Back to Glossary Index