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MrBilling (OP)
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May 20, 2013, 05:43:12 PM |
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I have two 5 card rigs.
Each one has 2 PSUs. The PSUs say they are 110-240V. At 110V they use 12 amps, at 220V they use 6 amps.
My whole house is mostly wired with 15 amp breakers.
I have a friend who is an electrician and will come run me a couple 20 amp 220V breakers/outlets.
Only thing is he isn't sure if you can plug the PSUs up to 220 once they have been plugged into 110.
None of the PSUs have 110/220 switches on them. They are supposed to automatically sense which V it is hooked up to. But I know some PSUs (not computer ones) want whatever they are hooked up to originally.
So since I have already been running my PSUs on 110 can I switch them over to 220 or will they not like that now?
Much thanks!
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Photon939
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May 20, 2013, 05:51:10 PM |
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If it does not have a voltage selection switch, then it is a newer design with active PFC. A feature of an active PFC system is that the input voltage doesn't matter as long as it's within its design range.
You could literally plug it into an adjustable transformer and spin the knob up and down from 90-240vac and the psu wouldn't care.
If it's an older design with the red voltage switch in the back, you will just need to flip it to 240v and you will be good to go.
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bcpokey
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May 20, 2013, 06:49:22 PM |
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I worry about an electrician that can't simply look at a PSU Label, as all modern PSUs that I know of state that they are designed for 120 and 240 input. That aside, photon said it all.
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MrBilling (OP)
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May 20, 2013, 06:52:21 PM |
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He isn't looking at anything.
He works as an electrician at Tropicana. He said that some of the power supplies they use up there will take 110 or 220 also but that once you hook it up it always wants whatever it was hooked up to first.
He wasn't sure if the computer PSUs were the same.
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razorfishsl
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May 20, 2013, 10:59:09 PM |
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lol.....
it is STill the same number of watts, it is not magic you do not get anything for free......
Yes they are switched mode PSU they work from about 95-350V, they really do not care if they have been on 110 before.
Only point is to make sure there are no dust bunnies and they have GOOD ventilation round the components because at 240 the break-over distances will be reduced if it is damp.
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GenTarkin
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May 20, 2013, 11:13:55 PM |
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yeah, thats why active PFC tends to survive a voltage surge more often than not, cuz they are extremely flexible ... and past the 300v range is when ur surge suppressor starts to clamp.
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tom_o
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May 20, 2013, 11:42:28 PM |
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He said that some of the power supplies they use up there will take 110 or 220 also but that once you hook it up it always wants whatever it was hooked up to first. So he thinks they'd put a sensor and a circuit to remember that and burn it to memory forever, rather than just a sensor. Think twice about allowing him to rewire your home. |
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dommyet
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May 21, 2013, 01:35:53 PM |
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for active PFC PSUs you don't need to switch the voltage, but you should check the manual first.
for a passive PFC one there may be a voltage switch on the PSU
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chungenhung
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May 21, 2013, 02:11:08 PM |
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lol.....
it is STill the same number of watts, it is not magic you do not get anything for free......
Yes they are switched mode PSU they work from about 95-350V, they really do not care if they have been on 110 before.
Only point is to make sure there are no dust bunnies and they have GOOD ventilation round the components because at 240 the break-over distances will be reduced if it is damp.
I think OP is wanting it to draw lower amps. |
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redtwitz
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May 21, 2013, 04:25:30 PM |
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He said that some of the power supplies they use up there will take 110 or 220 also but that once you hook it up it always wants whatever it was hooked up to first.
Computer PSUs certainly do not behave this way. I doubt any device would... |
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crazyates
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May 21, 2013, 05:02:47 PM |
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He said that some of the power supplies they use up there will take 110 or 220 also but that once you hook it up it always wants whatever it was hooked up to first.
Computer PSUs certainly do not behave this way. I doubt any device would... Well sort of. They can take 110 or 220, but you can switch anytime you would like. |
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bitpop
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May 22, 2013, 09:48:13 AM |
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It's automatic and your friend is an idiot and shouldn't be an electrician.
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minerapia
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May 22, 2013, 07:58:12 PM |
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lol.....
it is STill the same number of watts, it is not magic you do not get anything for free......
Yes they are switched mode PSU they work from about 95-350V, they really do not care if they have been on 110 before.
Only point is to make sure there are no dust bunnies and they have GOOD ventilation round the components because at 240 the break-over distances will be reduced if it is damp.
Yes, we european residents (and rest of the 220-240 V world) is plagued with PSU fires. lol |
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crazyates
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May 22, 2013, 08:13:30 PM
Last edit: May 23, 2013, 03:38:53 AM by crazyates |
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it is STill the same number of watts, it is not magic you do not get anything for free......
Mmmm not quite. Most PSUs will run More efficient on a 220V line. It's still the same wattage being drawn by the cards, that much is true. But, at the same wattage and higher voltage, the amps go down, which means less heat (heat = wasted energy). This lowers are draw from the wall, and can lower your bill. Only by 1-2%, but still... EDIT: fixed a crucial mistake, and fixed a typo. |
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sveetsnelda
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May 22, 2013, 09:27:46 PM |
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It's still the same wattage being drawn by the cards, that much is true. But, at the same wattage and lower voltage, the amps go down, which means less heat (heat = wasted energy). This lowers are draw from th wall, and can lower your bill. Only by 1-2%, but still...
^This. He's correct. |
14u2rp4AqFtN5jkwK944nn741FnfF714m7
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bcpokey
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May 22, 2013, 11:35:32 PM |
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It's still the same wattage being drawn by the cards, that much is true. But, at the same wattage and lower voltage, the amps go down, which means less heat (heat = wasted energy). This lowers are draw from th wall, and can lower your bill. Only by 1-2%, but still...
^This. He's correct.  |
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bitpop
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May 23, 2013, 01:04:43 AM |
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I just can't believe there's electricians that are so incompetent. I'm sticking to diy.
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Malawi
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May 23, 2013, 11:45:41 AM |
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It's automatic and your friend is an idiot and shouldn't be an electrician.
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HellDiverUK
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May 23, 2013, 01:30:36 PM |
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He said that some of the power supplies they use up there will take 110 or 220 also but that once you hook it up it always wants whatever it was hooked up to first. So he thinks they'd put a sensor and a circuit to remember that and burn it to memory forever, rather than just a sensor. Think twice about allowing him to rewire your home. This. Or ask him to lay off the weed for a few days before coming round. |
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snootch
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May 23, 2013, 01:31:09 PM |
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If the PSU doesnt have a switch and the label says 110-240v then it will auto switch. I would be more worried about your electrician friend replacing your breakers with 20A versions without checking whether the wire gauge was thick enough on that circuit to support the increased current you plan on drawing. If it's too small, you'd have to replace the wire with thicker gauge before using 20A breakers. Unless you really are itching for a house fire, that is.
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