hi,
i have this cables come with computer C13 10A-230V (0.75mm)
why there power supply using C13 in first place ?
they should use C19 to find cord with 2mm
C13 is the most common and easiest to find connector. Yes many computer cords using it are too thin, I've seen some as small as 18ga which is only good for 8 amps. But - the C13 is available with cords up to 16ga rated for 13amps and those are what you need.
Example for North American 110vac
http://www.mcmaster.com/#71535k43/=146kyluor
http://www.internationalconfig.com/cordhelp.asp#iec_60320Yes the C19 plugs/sockets are rated for higher current but are also harder to find.