PSU switch shuts down home's fusebox

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HyDrApt

HyDrApt

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Sep 10, 2015
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Hey guys, it's me again.

I'm facing another issue with my new build.
I've bought a Seasonic GSeries 550W, and it worked perfectly until I had to connect a PCI Cable, and it wouldn't fit in, because it had a fabric error.

So I went to the store, and traded PSUs. They didn't had another Seasonic on stock, so I brought a Corsair RM650x.

After connecting everything, I turned on the switch of the PSU, and my fusebox shut down. I believe a short circuit (hope this is the correct term) happened. Checked every cable, all was fine, flicked the switch again, the PC went ON. No problems.

Two days pasted, after using the PC a lot, and the same thing happened again. Mind that I always shutdown the switch when I go to bed. This could mean with was a faulty PSU.

So I went back to the store, and traded PSUs again. This time for the same one. I've brought it home, connected everything, flicked the switch ON, boom, fusebox down again. Tried one more time, no issues.

Later that day, same thing happened. This time, it happened twice in a row. I stopped trying, and started to test the PSU alone, without any motherboard conections in another electric Jack. All ok.
Connected the PSU to the PC, and to the same Jack. All ok.
Connected again to the old Jack, but this time, I used the Jack alone for the PC (it's usually connected to the screens, phone, modems and printer using an Electric extension) all ok.
Connected all the devices again, connected the pc, boom, fusebox down.

Could this mean that I have a faulty Electric extension? Or it might be something else that i'm missing.. I'm getting really confused.
 
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R
That is really strange and definitely sounds like an issue with the psu iteself. The good news is that modern power supplies have so many protection circuits built in so there is less of a chance that the components themselves get damaged.
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rtware923

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What else is plugged in on that fuse? Any major appliances? Maybe try running the computer in a different room (different fuse) for a day or two and see if this fixes the problem. Could be that the fuse for that room that the computer is in is already close to its limit.

Edit: Also how many things are plugged into the extension cord. This probably wouldnt be causing the problem but could still be a fire hazard.
 
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HyDrApt

HyDrApt

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The fuse is for our home office, which means there are my Computer things. 2 screens, 1 printer, 2 modems, 1 phone. No heaters, no AC, nothing.
Isn't it weird that I had a 650w PSU running there for 4 years with no issue, and had the Seasonic for 2 days with no issue, and with both Corsairs, this happens?

The extension cord has everything I said before (2screens, 2 modems, 1 phone, 1 printer and the PC). I don't feel it hot after being used for extensive hours.
 
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HyDrApt

HyDrApt

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Asked my dad about it, and he said that the power company issued an extra power consumption for my house, due to having 2 fridges and a freezer. About the wiring, how come it only shuts down when I use these Corsair PSUs?
 
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Paperdoc

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First (small) point: you say the "fuse box" goes down, but I think you mean only the fuse (or breaker) for that particular circuit goes down, NOT the entire house power system. Right or not?

Now, what you describe is that the computer system causes fuse failure often (but not always) whenever all of the components are in use, but any test that uses a reduced load in the computer system does NOT cause fuse failure. That strongly indicates that the circuit you are plugged into is near its load limit, causing frequent overloaded fuse conditions, and anything that reduces the load avoids the problem. You don't say what fuse rating is in use for that circuit. If you are in North America it is likely to be a 15 amp fuse on a 120 VAC circuit, but you may have something different. The particular computer system components you list together should not cause an overload on a typical house circuit. Thus, I suspect one of two things: you are using a circuit rated for less that what I usually expect, OR you actually have other items connected to that circuit that you don't realize.

To start with, you should recognize that a "circuit" powered from one fuse in the panel is NOT simply the one wall outlet you are using for your computer. It may also include wall outlets with other things plugged in, in that same room, AND in other rooms. Try removing the fuse that always fails, and go around the house checking for ALL the devices that do NOT work when that fuse is removed. Then you will know all the items on that circuit. Then you can understand the full electrical load on the circuit, and I bet it is more than just your computer system.
 
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Ripthruster

Ripthruster

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Also could be inadequate wiring. Just because the panel has a 10 or 15amp breaker, doesn't mean the actual wires are the proper type and gauge.
It's also possible that there could be something hard wired into the same circuit, so not plugged in a week jack. For example a water softener in the basement or a stove, a dishwasher, well pump.
 
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HyDrApt

HyDrApt

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@Paperdoc
It's the entire house power system that goes down. I've already checked what's connected to the breaker where the PC is, and nothing heavy is there besides printer, modems and pc screens.

@Ripthruster
The weird thing is, it didn't do this for years with my other PC's, it didn't do this when I had the seasonic for 2 days, it only started doing this with both Corsairs.


So, I've been testing a lot (while being afraid to turn on the PSU, cus I could fry my whole PC) and i've come with this results:
- Connected the PSU alone into another jack in the same breaker, all OK
- Connected the PC in that same jack, all OK
- Connected the PC in the "faulty" jack, all OK
- Connected the PC in the extension in the "faulty" jack, power down.

With these results I've come to the conclusion that it was a faulty extension line, weirdly enough. So I've bought another extension, and used a different jack also. Connected everything, all OK.

Rested with the results, I went to a friend's place to have a lan party this week. When suddenly, after plugging in everything, I flicked the switch, and BOOM, his power fuse goes down...
It was also connected to an extension, so I removed the extension and connected directly to the jack in the wall. Flicked the switch, nothing happened.... but after a few seconds, BOOM, power fuse down.

Talked to a friend there, and started testing stuff.
Connected my friend's PSU to my PC, all OK.
Connected back my PSU into PC, but only with mobo and CPU, all OK.
Connected both GPU and SSD, all OK.

At this point, I'm really afraid to power it ON again, just to find out that this is a random occurence of some sort.
 
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rtware923

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That is really strange and definitely sounds like an issue with the psu iteself. The good news is that modern power supplies have so many protection circuits built in so there is less of a chance that the components themselves get damaged.
 
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