We would like to make you aware if you do an Ex type non electrical manufacturing, and you add Ex certified electrical device, it is an Ex installation, and your Ex personnel competency shall be considered, but Ex non electrical type approval shall be applied as a non electrical machine.

If you do Ex non electrical and electrical manufacturing, the whole unit shall be Ex certified as an Ex electrical machine.

The 1st option is more realistic and closer to life scenario, but 2nd may happen too.

Keep up good work!