Thread: what fuse 4 laptop carpc?

anyone?

Originally Posted by patrik999

I will install a laptop carpc in a bmw e46.

the sound will go thru the HU, the fuse will secure the laptop, usb for gps module, mobile phone and maybe a 3rd usb power socket....

tnx

check the amps on the power supply-s, sum them, then add another 10A to it

tnx

will you be adding USB hubs or just using the laptop's onboard USB ports?

if using the laptop's USB then you only need to to know the laptop charger/PSU power draw. if using powered USB hubs then add the draw of the laptop and hub power supplies and round up to the next highest (standard) fuse rating. for example, if your laptop PSU draws 5A and your hub draws 2A then a standard 10A fuse would be fine.

remember, the primary putpose of an power/in-line fuse is to protect the wire. so make sure your power and ground wires can handle the amperage that the fuse is rated for. you can always downsize a fuse, but never use a fuse rated higher than the ampacity of the wire you use. if you use smaller wires that branch off to each component then you need to fuse them separately as well (again, not to exceed the ampacity of each wire).