A convertible supplementary wiring insulation board device for electric experiment

The utility model belongs to the technical field of electric power and a convertible supplementary wiring insulation board device for electric experiment is disclosed, including box and disconnecting switch, the box is inside to be equipped with A wiring end, B wiring end, C wiring end, the N end of working a telephone switchboard to and 1A wiring end, 1B wiring end, 1C wiring end, the 1N end of working a telephone switchboard, the disconnecting switch both ends all are equipped with a wiring end, b wiring end, c wiring end and 1a wiring end, 1b wiring end, the 1c end of working a telephone switchboard. The utility model discloses usable insulation drags the ground wire with A wiring end, B wiring end, C wiring end and direct linking to each other of N wiring end of transformer high -tension bushing and wiring board, arranges easy -operating ground in, any pilot project line changing later, only need to 1A wiring end, 1B wiring end, 1C wiring end and 1N wiring end work a telephone switchboard can, practice th