ATX ATEX Explosion Proof Enclosures Bud Industries ATX TEX Certified Explosion Proof Enclosures are designed for intermittent explosive atmospheres (excludes mining) such as gas (Category: II, Zone: 1&2) grain dust and conductive dust (Category: III, Zones 21&22), the enclosures offer equipment protection with increased safety (e) and dust protection (tb). The ATX Series is UL listed (Type 6P) and rated at IP66 PER IEC 60529 Standard.