amps for pc power plug

[malboroiceblast]

Hi!

I have a custom built pc by a friend with a 650 watt psu, would a 13a fuse be too much or too little for the power plug? If so how many amps should i use instead?

Thanks in advance

 

[nukemaster]

I would guess you are on a 230 or 240 volt system.

650 watts @ 240 volts is 2.7 amps. Now computers need MORE power because some is wasted on conversion from 240 down to the required voltage for computers.

I would check the power supply manual to see what is recommended in your area.

 

[malboroiceblast]

I have a cosair 650 watt, is the 13 amps fuse too much and bad for the desktop?

 

[nukemaster]

What other sizes do you have 15 amp is standard here, but we only have 120 volts.

Since we do not have in plug fuses like you do, I am not the best person to answer this.

You seem to have 2 common sizes 3 amp and 13 amp. 3 amp is good for a bit over 700 watts. If your computer was pushed to its limits you may get past 700 watts at the wall.

I would say if you are worried, try a 3 amp and as long as it does not blow, you are good. Not too many computers draw over 700 watts at the wall.

A large fuse does not hurt the device, but in the event of a failure a device could draw well beyond what it should. I am kind of surprised you do not have more fusing options. Here I have all kinds of options, but 15A is the standard.

Most if not all computer power supplies should have a built in fuse as well(most modern electronics have some form of fuse build in.).

EDIT If that selected solution was a mistake, let me know and it will be removed. I hope someone else from your area chimes in too.