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Home heating pipe, or industrial heating tube, or frequent, general electric tube following three-contact single-phase 220​​-volt power supply, single-phase 380-volt power supply, three-phase 380-volt power supply, the first home more,two kinds use less the only AC Welder frequently used single-phase, 380-volt power supply, the third industrial motor class with much.
Working conditions in the process, he also required, such as air relative humidity less than 95%, non-explosive and corrosive gases exist that can be used, followed by the working voltage should be no greater than 1.1 times the rated value, the shell should be effectively grounded . The third insulation resistance ≥ 1MΩ dielectric strength: 2KV/1min
   External environment for the whole, some operating Notes
First: electric tube should be prepared to fixed positioning, effective heating area must be completely immersed in the liquid or metal solid, non-air burning.
Second: electric tube to the product of the fusible metal and solid nitrate, paraffin, melt first electric tube do not rise to the rated voltage, medium rose to the rated voltage.
Third: In the heat of some chemicals, should be prepared to explosion-proof safety measures.
Fourth: the discharge the electric tube wiring portion corrosion, reduce safety and service life of the heating tube
Fifth: electric tube should be placed on dry place when not in use to save.