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As aflame retardant, red phosphorus has been widely used in the plastic shell ofpower supply, wire insulation layer, transformer skeleton, and some insulatinggaskets and partitions，but why inrecent years, more and more institutions have announced that it is banned?Redphosphorus is exposed to high temperature, high humidity, and conductiveenvironment for a long time, which will causeinsulating plastic becomesconductive plastic, and it will cause safety problems in the quality ofelectrical insulation and power supply.This does not meet the requirements ofthe safety regulations for reinforced insulation, so it is very necessary toprohibit the use of red phosphorus in switching power.