I need to install conduit and receptacles in a large cold room that the fire marshall has classified as Class1 division 2 location. (they store flammable chemicals in this room) The walls of the cold room are lined with 3" foam, my two questions are:
1. how do mount conduit and or boxes to a foamed wall. Do i need to penetrate through the foam and mount to concrete or there are special hardware for foam?
2. I am not very familiar with article 500, is EMT allowed with this location?
Thank you.