splicing a power cord together

I want to make a laptop power supply cord longer by connecting two power supply cords together. My question is?
one power supply cord has a ( RED WIRE AND A WHITE WIRE) and the other power supply cord has a (WHITE WIRE AND A GREY WIRE). Which wires do I solder together to make the wiring correct.

iman1235 years ago
If you have a power "brick", one side is typically AC and other is DC. Like lemonie said, if youre extending the AC side, it doesnt matter if you swap wires or not. If youre not sure, a voltmeter can help.
lemonie5 years ago
If you extend the AC wire then it doesn't matter.
Use terminal block or some other power-connector.