240v input for power supplies

[Hondacity]

2pole + ground = work or not work?
120v + 120v + ground = work or not work?
240v + Neutral + Ground = work or not work?

thanks

[p4l1ndr0m3]

Originally Posted by Hondacity

2pole + ground = work or not work?
120v + 120v + ground = work or not work?
240v + Neutral + Ground = work or not work?

thanks

First of all, why?

2pole + ground = work or not work? Have to have a neutral, PSU only has hot, neutral, and ground coming in, 100% not designed for 2 pole.
120v + 120v + ground = This is the same thing as the above
240v + Neutral + Ground = work or not work? Will burn your house down on a 15A or 20A 120v receptacle. The insurance company will deny your claim if they find this.

None of the above will work.... Not to mention any 240v receptacle will have a different plug on it. Forcing 240v onto a 15 or 20amp 120v receptacle sounds like a great way to burn your house down. There is a reason why 240v household receptacles require a 3 wire circuit (plus ground) except for something like an AC compressor. Now if you are referring to the phased power in industrial applications that is at 277v, I don't think that will work either.

Euro power is 220v at 50hz. Power in America is 120v at 60hz.


Why do you think you need 240v going to a PSU anyway?

[Hondacity]

just asking..thanks for your input...

[Zero82z]

Originally Posted by Hondacity

2pole + ground = work or not work?
120v + 120v + ground = work or not work?
240v + Neutral + Ground = work or not work?

thanks

Like p4l1ndr0m3 pointed out, those first two lines are the same thing. A 240V phase with a neutral and a ground will certainly work (assuming the PSU has APFC and is full-range), since that is the type of power used in European countries and other places.

Originally Posted by p4l1ndr0m3

First of all, why?

2pole + ground = work or not work? Have to have a neutral, PSU only has hot, neutral, and ground coming in, 100% not designed for 2 pole.
120v + 120v + ground = This is the same thing as the above
240v + Neutral + Ground = work or not work? Will burn your house down on a 15A or 20A 120v receptacle. The insurance company will deny your claim if they find this.

None of the above will work.... Not to mention any 240v receptacle will have a different plug on it. Forcing 240v onto a 15 or 20amp 120v receptacle sounds like a great way to burn your house down. There is a reason why 240v household receptacles require a 3 wire circuit (plus ground) except for something like an AC compressor. Now if you are referring to the phased power in industrial applications that is at 277v, I don't think that will work either.

Euro power is 220v at 50hz. Power in America is 120v at 60hz.
http://wikitravel.org/upload/shared/..._frequency.png

Why do you think you need 240v going to a PSU anyway?

You provided absolutely no justification in your post for your claims that a PSU will not work off of two-phase 240V power.

While I'm not saying it will, I also can't think of a reason offhand why running a PSU off of two-phase 240V power wouldn't work, unless for some reason the PSU can't handle the frequency with two phases. The potential difference between the two phases will be 240V, just like in Europe, even though there's no neutral. Since everything is fed through one or more bridge rectifiers, I don't think it would make a difference whether you used two 120V lines that are 90 degrees out of phase with each other or one 240V phase and one neutral.

[Hondacity]

actually i know 2 pole is 2 phase...hehehe

the 3rd q ....i think is for asian countries like philippines, i think thats their config. 22v0+n+gnd

2nd q is the current config...zero's comment intrigues me...maybe it might work.but i dunno..i don't want to kill my psu...this is the outlet for the airconditioner.

last weekend i was tripping a breaker...running 4 way sli 580s with a gulftown... and yes we're running 2 power supplies..and liquid nitrogen... and a bitcoin farm was connected to it..so pretty much near the breaker trip point..

anyways i'll ask the antec tech support maybe they know something more..

[p4l1ndr0m3]

Originally Posted by Hondacity

actually i know 2 pole is 2 phase...hehehe

the 3rd q ....i think is for asian countries like philippines, i think thats their config. 22v0+n+gnd

2nd q is the current config...zero's comment intrigues me...maybe it might work.but i dunno..i don't want to kill my psu...this is the outlet for the airconditioner.

last weekend i was tripping a breaker...running 4 way sli 580s with a gulftown... and yes we're running 2 power supplies..and liquid nitrogen... and a bitcoin farm was connected to it..so pretty much near the breaker trip point..

anyways i'll ask the antec tech support maybe they know something more..

You need to run a dedicated circuit with a single pole 20A breaker for your computer. All you need is a 20A breaker (assuming you have spots on your panel), 12/2 romex, a 20A receptacle, and a single gang retro fit box.

OR!!!! If you are brave enough, you can convert that 2-pole air conditioner outlet to a proper 120V 20A circuit. You will need to move the white wire in the panel box to the neutral bar on the panel and replace the breaker with a single pole 20A breaker (you are probably on a 30A now). Then all you would have to do is get a new 20A outlet. Just make sure the wire is 12/2 not 14/2, otherwise you have a potential fire hazard (especially since you are tripping what I assume to be a 15A breaker).

Remember, on a 15A breaker you only have approx. 1650W of power available. On a 20A breaker, you get about 2200W.

[p4l1ndr0m3]

Originally Posted by Zero82z

You provided absolutely no justification in your post for your claims that a PSU will not work off of two-phase 240V power.

I never said the power supply wouldn't, I only said it wasn't designed for it. However, electrically, it is not a good idea and probably wouldn't work. In all likely hood, he would probably end up tripping the breaker almost immediately as soon as that monster setup juiced up.

[Zero82z]

Originally Posted by p4l1ndr0m3

I never said the power supply wouldn't, I only said it wasn't designed for it. However, electrically, it is not a good idea and probably wouldn't work. In all likely hood, he would probably end up tripping the breaker almost immediately as soon as that monster setup juiced up.

How do you know PSUs aren't designed for that? How is running a PSU on two-phase 120V power effectively different from doing it with single-phase 240V power? Again, you have nothing to back up what you're saying.

By the way, using a 15A or 20A breaker or receptacle with 240V is actually safer than doing it with 120V, since for a given amount of load there will be half as much current. Countries that use 220V/240V power have much lower current rating standards because of that. It will not start a fire or "burn your house down."

[p4l1ndr0m3]

Originally Posted by Zero82z

How do you know PSUs aren't designed for that? How is running a PSU on two-phase 120V power effectively different from doing it with single-phase 240V power? Again, you have nothing to back up what you're saying.

By the way, using a 15A or 20A breaker or receptacle with 240V is actually safer than doing it with 120V, since for a given amount of load there will be half as much current. Countries that use 220V/240V power have much lower current rating standards because of that. It will not start a fire or "burn your house down."

I'm not going to get in a pissing match about it. Electrical code exists for a reason. The correct solution to the problem is to have a dedicated 20A circuit. You are also greatly mistaken if you think that turning a typical 120v receptacle into a 2 pole 240v won't start a fire when certain things are plugged in. It is for the same reason that you are not allowed to dim lamps via voltage control on outlets (despite the numerous systems like Lutron that do it anyway). If you plug in a device with a motor (such as a vacuum cleaner) to an outlet with improper voltage for that device, there is a substantially increased chance of starting a house fire.

Whether or not this will work in theory isn't even really relevant at this point. On the off chance there was a house fire due to improper tampering with the electrical, there is no chance that an insurance company would cover the loss. I fully welcome someone to try this in a controlled environment (i.e. a lab or something). It would be a new selling point/feature for PSUs. I just don't think that a person's home is a great place to test electrical theory, especially, (no offense) when the OP seems like a novice electrician.

I'm not trying to be a jerk, I just don't want to hear about someone doing something they shouldn't in their home and getting hurt because of it.

[Zero82z]

Again, I'm not saying that he should do this, or that it will work. What I'm saying is that your arguments against it have no substance. As far as the receptacle issue, I suppose a higher voltage could cause arcing which may lead to a fire in certain situations. However, it isn't too hard to find a way to avoid that.