Section R. 408.40741 - Arc welding machinesRule 741.
(1) An arc welding machine shall be capable of operating safely in the environment in which it is located. The design and construction shall enable the machine to carry its rated load with rated temperature rise where the temperature of the cooling air is not more than 104 degrees Fahrenheit and where the altitude is not more than 3300 feet (1000 meters approx.).(2) Where unusual service conditions exist, such as corrosive fumes, steam, oil vapor, flammable gases, vibration, shock, dust, or weather, a specially designed arc welding machine shall be used.Mich. Admin. Code R. 408.40741