To remove cover fully, two methods are recommended. Due to the potential weight of the cover, it must be supported prior to removal of hinge bolts. Installation INITIAL SET-UP:Tools General Mechanics Tool Kit, Appendix B, Item 1 GeneralWARNING ELECTRICAL SHOCK Before performing any maintenance actions on electrical equipment ensure all electrical power has been turned off. Death or serious injury may occur from failure to do this. REMOVAL. Blast-proof enclosures are protective devices designed to prevent the consequences of fires & explosions. The testing procedure will take into account the free internal volume after all the components have been fitted, the temperature rise (determined by the. ox Enclosures FM, CSA, ATEX, IECEx Certified. Classifie tion boxes are certified to provide explosion-proof terminals protection in hazardous locations and excellent resistantce to environmental conditi EX & I CEx - Exd IIC Ex tD. The 141-20 box is 316 Stainless Steel, 316 Stainless Steel extern. Ex Industries (exindustries) is a global supplier of advanced hazardous area solutions, offering a wide portfolio of certified products including explosion proof electrical boxes, explosion proof junction boxes, explosion proof lighting, intrinsically safe barrier systems, explosion proof cables. Explosionproof enclosures are used as classified enclosures, pull boxes, or control panels in rigid conduit systems and with metal clad cable rated for hazardous locations.