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Can Zone 2 Gc Equipment Inside a Zone 1 Gb Ex de Enclosure
Can zone 2 IECEx equipment go inside a zone 1 rated panel, or, is the atmosphere inside a Ex de Gb panel de-rated to zone 2?

I have a SS enclosure rated to IECEx Ex de IIC T6 Gb. Can I place a zone 2 rated Gc power supply in the panel? Its been suggested to me that zone 2 equipment can go inside a zone 1 rated panel.