Patent ID: 7495431

Claim:
An electric power cord comprising: a first plug having a first electric cable adapted for connecting to a power source; two second plugs adapted for connecting two electric devices, each electrically connected to the first electric cable of the first plug via a second electric cable; a first sensor electrically connected to the first electric cable for collecting electric characteristic analog signals thereof; two second sensors respectively electrically connected to the two second electric cables for collecting electric characteristic analog signals thereof; three meter chips respectively electrically connected to the first and second sensors for receiving and converting the analog signals to digital signals; a multiplexer electrically connected to the meter chips; a control circuit controlling the multiplexer to selectively receive the digital signals of one of the meter chips; a display control unit electrically connected to the multiplexer; and a display module, the display control unit receiving the digital signals from the multiplexer and driving the display module to display electrical characteristics of the electric device corresponding to the digital signals, wherein the three sensors, the three meter chips, the multiplexer, the control circuit, the display control unit, and the display module are secured with respect to the electric cables.