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Thread: Fuse size for kettle lead

  1. #1
    Thundercats Ho! starbuck's Avatar
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    Fuse size for kettle lead

    I lost all power to my desktop. Tried a different kettle lead, and still dead. So I tried a different motherboard and a different power supply. It was still dead.

    Finally found out I had 2 duff power leads that the fuse had gone in(the spare must have gone in last few years and I never noticed). Anyway, I checked the fuse in one of the leads and it's a 5 amp fuse.

    This seems a bit small for a desktop PC (especially as I have an 800 watt enermax PSU). Is the fuse for a power supply supposed to be this small?

    I just want to make sure I fit the right fuse, as if it's supposed to be a 5a fuse, I don't want to fit a 13a fuse and risk the fuse not doing it's job. On the other hand, I don't want a fuse too small and have it blow to easily.

    Any ideas?
    I do know everything, just not all at once. It's a virtual memory problem.

  2. #2
    Not a good person scaryjim's Avatar
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    Re: Fuse size for kettle lead

    power = current x potential difference

    A 5A fuse on a 240v mains circuit can handle 1200W throughput before it blows. More than enough

  3. #3
    Going Retro!!! Ferral's Avatar
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    Re: Fuse size for kettle lead

    Yeah, 5amp is more than enough for a PC.

    You could have had an electricity spike during some bad weather or during the night which has caused the fuse to blow.

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