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Zone 22 device in Zone 2 area

Question asked by wanda.earll on Jul 16, 2020
Latest reply on Jul 16, 2020 by wanda.earll

A process room contains a piece of machinery rated Class I Zone 1 internally, Zone 2 externally. An auxiliary piece of equipment rated Class II Zone 22 is being added. What are the requirements for the Zone 22 item; does it need to be dual-rated for gas & dust? Is there a requirement for 1-meter distance between Gas/Dust Zones similar to Zone 1 and Zone 2?