3 Phase and ATX PSU'S?

[Signedbyme]

Hi there

I am currently starting to change my small farm to 240 from 120!! I was just wondering if ATX PSU's accept 3 phase 240? If it is product specific than could someone tell me where to look. I have a bunch of different PSU's sooooooo...

Ps. its a dedicated 50 amp. With 6 gauge wire and 5 20 amp receptacles
Thanks 

Chris

[QuintLeo]

I have never seen an ATX-type power supply that even THOUGHT about using 3-phase power directly.

 I doubt they exist - 3-phase isn't needed 'till you get into the MANY-KILOWATT range on electrical gea, a standard common 20amp 220 circuit is good for 4 KW after all and higher power 220 circuits aren't UNcommon (ref some electric stoves, some commercial electric driers, and RV-type connections, for a few examples of 30+ amp 220 plug-in circuits).

 For that matter, mobile homes used to COMMONLY use a 50 amp 220v plug-in connection (often set up 2 on one pole feeding from one common meter with a 100 amp feedline, the second circuit usually intended for a utility outbuilding, workshop, etc). Those hookups are no longer permitted under the US NEC, but they're allowed on a "grandfathered" clause for existing setups in most locations.

[Signedbyme]

OK well SHITTT. The power line is coming from a old hot tub. How could i change the breaker from 3 phase 240 to single phase 240? If its to hard to do may just hire some one

Thanks for the response

[DarkStarPDX]

If you have standard three-phase already (4-wire wye) and power supplies that support 208 volts, you should be able to use L1 & L2, L2 & L3, or L1 & L3 to the power supply. If you have a three-phase delta (480 volts), you'll need a step-down transformer to 240 volts (or 120 volts).

Most power supplies support a range of voltages, for example one I have here is 110-120 volts & 200-240 volts compatible. Others I've seen are 100-250 volts.

Feel free to post the power supply make & model and we should be able to figure it out.

[Signedbyme]

As you all can tell i am a noob at electrical wiring. The hot tub has 4 wires coming in. as i can see it is 2 hots a neutral and a ground. I figured it was 3 phase because that's what my DAD said ( Im only 14). But after looking i believe that it is single phase 240 with 2 hots and 1 ground, the neutral in for any 120 systems in the tub. Please let me know if i am missing something.

THANKS!!

[notlist3d]

As you all can tell i am a noob at electrical wiring. The hot tub has 4 wires coming in. as i can see it is 2 hots a neutral and a ground. I figured it was 3 phase because that's what my DAD said ( Im only 14). But after looking i believe that it is single phase 240 with 2 hots and 1 ground, the neutral in for any 120 systems in the tub. Please let me know if i am missing something.

THANKS!!

My advice is be careful and have your dad help you looking at it.  When I hear 14 and looking at electrical ....  makes me a little worried.  But again I would get your dad to help make sure it's not live so when looking at it you are not in danger.

Do you have a picture of outlet? Or is it just wires ran from electrical box?  Also a picture of breaker might help.  But again get your dad to help during this.

[Signedbyme]

As you all can tell i am a noob at electrical wiring. The hot tub has 4 wires coming in. as i can see it is 2 hots a neutral and a ground. I figured it was 3 phase because that's what my DAD said ( Im only 14). But after looking i believe that it is single phase 240 with 2 hots and 1 ground, the neutral in for any 120 systems in the tub. Please let me know if i am missing something.

THANKS!!

My advice is be careful and have your dad help you looking at it.  When I hear 14 and looking at electrical ....  makes me a little worried.  But again I would get your dad to help make sure it's not live so when looking at it you are not in danger.

Do you have a picture of outlet? Or is it just wires ran from electrical box?  Also a picture of breaker might help.  But again get your dad to help during this.

Yea sure i understand that 14 is young to be working with 50 amps of 240 but as always the breaker is off and double check at the tub. ( My dad is very supportive and all about safety ). It is just wires coming out of the ground. 4 wires 3 connected ( 2 hots and a ground ) 1 unconnected neutral i think.

http://imgur.com/a/Upm9Y

(It wont show up because of account rank!! CLICK THE LINKS!!)
 
It may be unclear but the wire all the way to the right is not connected and i think its the neutral!!

[DarkStarPDX]

Based on that breaker and wiring configuration, it is a single-phase 240 volt connection. A three-phase breaker has 3 distinct sections.

The unconnected wire is (as you suspect) your neutral line. If a device operates as a single 240 volt device, neutral isn't used. If a device operates as "two" 120 volt devices, neutral is used.

So, if you have a power supply that supports a 240 volt connection, you can connect one hot to one input, the other hot to the other input, ground to ground, and you should be good to go!

[Signedbyme]

Thanks to every one who helped me and have answers.


Chris

Happy Mining