Wiring a 480V Single Phase Circuit

This is Turtle.

So After the voicing your anger, What do you have to say about it.

TURTLE

Get your facts straight, if your gonna try to use it as a put down, ya chump. It was bleed over from the "Package Unit Wire/Amp Rating" thread, you know it. You know, where you found it necessary to check-in as a cluless moron (along with many of the others in the alt.HVAC subgroup of alt.H(ack)VAC flex/fiberboard duct boys), just like you found it necessary to check-in as a moron in _this_ thread.

Here's YOUR clueless post :

Message-id:

"You stoopid ass.

The breaker size is dependant on the wire gage--and it is to protect the wire.......makes no differance if there never gets a load connected to it at all, ever......

Matters not if you connect a 100 amp load to a # 10 wire with a 30 amp breaker--sure it will trip the breaker, but the important thing is it will trip the breaker before the wire catches fire.

No anger here, Turtle, just speaking to 'em in their own language. I believe that I had most of my say in the "Package Unit Wire/Amp" thread in alt.hvac. and in the bleedover in a few other threads. But now that you bring it up, there are a few more things on my mind. If PJM and his cronies are so adamant about "homemoaners"(as HE and others call them) posting in alt.hvac, and seem to enjoy the personal attacks on them, WHY is it that at least ONE of the regulars over there can't find the time to post the FAQ so that homeowners know not to post there? I also find it interesting that the very same people get their bread buttered by hardworking homeowners find it necessary to refer to the hand that feeds them, in a public forum of all places, as "homemoaners?

"Bleedover" huh.....so you can do that but not me ???

Find fault with the statement--remember, the intended load has not been defined as of yet..........

Chump must be a really serious insult where you are from........means little to me though--do they let folks use computers in the joint???--just curious, as I've heard certain things.........

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...................Okay, back to square one here...........................

I have 120/ 208v service, what is 277v single phase ???

Do I need a three phase service to operate a 480v single phase load ???

What is "single phase" ???

How many ways can it be produced ???

=========

What a fish........

Ya ever stop to consider you just *might* be taking these usenet

According to PrecisionMachinisT :

"Two phases from a three phase circuit" is a single phase circuit. How it's derived isn't really relevant at the point-of-use.

The confusion arises out of the word "phase".

Technically, "three phase" describes the circuit itself. When you "take two phases" from a three phase circuit, "take two phases" is slang for what would have been more clearly said as "taking two of the three hot conductors".

What does that have to do with the situation at hand?

That's also correct, but doesn't imply (as perhaps it should) that the two wires are hot wires. Not one of the hots and a neutral, for example.

According to Jake :

Out of curiousity, I did a few google searches.

H'm. At least some commercial grade grow lamps run at 480V.

See, for example, the GLX series of fixtures:

Do any of you guys realize what "phase" means? It's not -just- the hot wire - there also has to be a phase difference in the voltage in each wire to generate the required voltage IFF it's more than a single-phase system. 480Vac single phase is pretty standard stuff in industry as is showing up here.

Pop

used for.... my

stories on these

named after them.

/me hands the man a star

..and has been for years elsewhere. In Aussie we have been manufacturing and installing 415 Ø fan motors for the refrigeration industry for years ! It is also common practice (or was) to connect Refrigeration systems with a 415 Ø control circuit..giving the added no cost protection of a simple phase failure unit...but I wabbit on..sorry. Thanks for your heads up :-)

BTZ

Im not confused, someone else is confused about some apparent percieved confusion--you just got caught in the crossfire is all.....

Absolutely nothing, except to demonstrate you can generate OR pick a single phase and generate three phases from it.

Notwithstanding, I *will* concede that at most any modern commercial power plant, three phases are generated......sheesh....pertty sure theres generally three syncronous alternators upon a common shaft electrically linked via a wye connection.....

Hell, I'm a machinist, myself and many others like me actually make the damned equipment.........

If I look closely I can see bits *I* actually made in these photos :

Unless its corner grounded delta, or some other obscure and likely obsolete transmission system, granted, no.

Point being, while it is one thing to have a specific service into a facility, and then only purchase equipment that will easily integrate into the existing plant electrical distribution, it is quite another to have the knowledge and ability to interface equipment having different needs into an existing system--480 v single phase can be easily supplied to most any equipment.....pretty much regardless of the existing AC service, be it three phase or single, so long as it is capable of handling the amperage draw of the connected load.

Cheers,

"homemoaners?

Well, Im not Turtle, but......

But alt.havoc is like a big family there.

However dysfunctional you choose to view is up to you.

Remember, you are now a part of this extended Errrr "Family"................

snip

I suspect that the very form of elitism that exists on the beer Swillers Porch that is ... Another Hackers Vocal Arsewipe Circus ...precludes any such warning. My guess is the indigenous expect people to read the A.HVAC Charter which (apparently) invites only Professionals to discuss HVAC at a Professional level. Sadly the inhabitants need to revisit the intent of the Charter,, at least IME. That said,, the forum was not always that way inclined,, However too many Xmas's and too many ClicktyKlik WinBloes versions later,, it is the way it is :-(

Sad but true.

BTZ

It's funny how these old threads pop up now and then. But anyhow, single phase in my little world can be 480 line to line and 480 line to ground. I think it's called corner ground delta. Some rural utilities here in Nebraska use it to supply irrigation well motors. We run four wires from the service disconnect to the pump panel. The neutral and equipment ground are connected in the meter. The grounded leg isn't generally supposed to be fused.

Oops. Dummy attack on my part. What I described above is one version of 3ø 480. We also do have single phase 480 which is just double normal household voltage. We add a phase converter to create 3ø

I have seen a lot of 240 corner delta for sewer lift pumps. The service looks exactly like regular 120/240 except it is fed from 3 transformers. (2 pole breakers with a neutral bus). The first time I saw one it had me going fir a minute. They had 3 phase pumps on something that looked like single phase

replying to Pop Rivet, rricha04 wrote: How about a plasma cutter like Hypertherm Powermax 85 Input voltages: CSA 200 ? 480 V, 1-PH, 50/60 Hz

replying to Joshua, William Ross wrote: Looks like you bought an overseas appliance. This is why you need a transformer when American and traveling abroad.

replying to Pop Rivet, William Ross wrote: Truly made offshore!~

replying to TURTLE, Jr Frazier wrote: I have a stratus aircond that goes in a electrial cab that came 480v 1 single plase. I was think two legs of 480 hot but just wont to check .hate to blow up