Cable has four lines, which is two power cords? The data line?

< / p > < / p > < / p > < / p > red and black is the power cord, white and green line used for the transmission of data < / p > phone charger in four of the thread colors are: red, white and green and black. Two wire cable, the two is the power cord including grounding, < / p > red line: positive ( Connection are identified as: + 5 v or VCC) 。 < / p > white line: negative voltage cable ( Are identified as: Data - Or USB Port ) 。 < / p > green line: positive voltage cable ( Are identified as: Data + +) or USB Port 。 < / p > black line: grounding ( Are identified as: GND) 。 < / p > < / p > simple can be summarized as: red ( Power supply) , green, Data line 1) , white, Data line 2) , black, Grounding) 。 < / p > resources: baidu encyclopedia < / p >