Circular telegram shows single -phase plug

The utility model relates to a power plug specifically is a circular telegram shows single -phase plug. The problem of the plug structural design that current circular telegram shows is unreasonable, therefore uses inconveniently or unreliable is solved. This circular telegram shows single -phase plug comprises male plug and live wire, null line pin on it, and the dropping resistor and the emitting diode that are equipped with in the male plug by 4.7k omega concatenate the display circuit that forms, and the both ends of display circuit are connected with live wire, null line pin respectively, and last open of male plug has display hole, and emitting diode's light emitting end head is put down and is exposed display hole, does not feel it is thus clear that it is smooth that its is protruding. The utility model has the advantages of reasonable design, preferred in the setting of dropping resistor and its resistance specifically embody to and emitting diode's " see its light and do not feel its is protruding "