Hello friends,
I have an EVGA 500B (500w) psu powering my pc, the default power lead is only about 50cm, I've found another lead, I think it's from an amplifier. It is 5A and 250V, will it be suitible for my PC ? It's about 200cm so it would mean I could move my PC into a much better position !
Thank you.
It will work perfectly so long as it's grounded.
I.E. This: 
Or: 
Not This: 
Some quick trivia, your standard PC uses the C13/C14 IEC connectors (the first image), often mislabeled as a kettle plug due to their similarities. Kettle plugs are actually the C15/C16 connectors (second image) and are purpose built for the higher draw of those devices giving them a 120C "hot condition" rating. The difference isn't a problem for powering your standard PC, but it would be if you were to try powering your kettle with the PC's cable.
What Fouquin said, if it fits and has ground it will most likely work.
I have a bajillion power cables from power supplies, monitors, and whatever else, and I've swapped between them so many times I have absolutely no idea which cable came with which item anymore. But my house hasn't burned down yet, so I'm going to assume it's safe.
Cheers mate, that was perfect. Jup it's grounded awesome.
Have a nice day.
It only matters if your consuming constant power in the 1000watt + range, then you will need a thicker gage to compensate so the cable doesn't melt.
5 Amps on the plug or the cable, as some plugs might be rated @10amps but the cable is only rated at 7.5amp as an example. I've have seen
Also depend on your mains voltage. ~500w @ 230V would be about 2.1Amp where ~500w @ 110V would be about 4.5Amp
500W is the output current on the DC side so the AC input would be around 510 - 550ish Watts depending on the efficiency maximum.But this is if you are putting 500Watts from your components, which is less like now day unless your doing Multi-GPUs .
So you should be OK.