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Question:

What can cause an outlet fuse to blow?

I have a problem. I have an outlet that has a computer with a 500w psu, stereo, printer, two monitors, and a external hdd. The problem is that the outlet fuse keeps blowing and I cant figure out why. Im pretty sure im not exceeding the maximum power usage and I have already replaced the outlet. Im worried that one of my components may be shorting and leaking current but I dont know how to check. I do know however that it has nothing to do with the electrical infrastructure of my house because my father is using the exact same outlet now for his computer and hes not experieced the outlet blow yet.How can i find out which component is cause the problem?

Answer:

Each component that you plug into the outlet should have an ID plate stating the watts (power) or the VA (volt-amps) [same thing]. The total should not exceed 1500 Watts. I would guess that the outlet (receptacle) is a standard two slot outlet (handles two plugs only). If it has the 2 straight flat blade (vertical) one shorter than the other, it is rated for 1500 watts (15amps of current). If both of these flat blade slots have a horizontal slot (notch) in the middle of each blade, it is for 2000 watts or 20 Amps of currant. It sounds like you are using a power strip of some sort (most are switched with a red pilot light and maybe even a 15 amp breaker as protection). Of course the wiring to that outlet should be 12/2 AWG wire and the fuse or breaker should be 20 Amps. Again the maximum load should be no more than 2000 watts total. (About the same as a space heater). If you total up the ID plates of each electrical appliance you have connected you will find that over a long period of time if you are running pretty close to that limit and the fuse or breaker gets tired. Heat is the culprit. You total up the watts of the hdd, two monitors and maybe the stereo (PA). I don't think your printer or external hard drive draw that much. Also you should have room around your equipment for ventilation. Good Luck - I hope this helps.
unplug each component one at a time, switch the component to another outlet (use an ext. chord if needed). Run the remaining components as normal for a few days or until it normally blows. If it doesn't blow, try a different component and so on.

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