"PrecisionMachinisT" wrote in message ...
"Volts500" wrote in message
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Subject: Wiring a 480V Single Phase Circuit
From: "PrecisionMachinisT"
Date: 7/17/2004 8:25 PM Eastern Daylight Time
Message-id:
"volts500" wrote in message
...
"PrecisionMachinisT" wrote in message
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At any rate, a better description IMO would have been something like
"
a
two wire service, usually one phase of a three phase supply"
One phase to neutral of a 480 volt 3 phase supply is single-phase but
the
voltage is only 277 volt. The OP wanted to know what single-phase 480
volt
was. Chris was absolutely right, whenever 2 phases of a 3 phase
system
are
combined, the resultant sine-wave is single-phase. (It's called
single-phase because _that's_ what it is.)
Horse ****.
Makes absolutely no differance how it is derived--could be from a single
phase generator, or battery backup with an inverter and still be single
phase.
You need to toss the three phase reference out the door because it is of
absolutely no value in defining single phase power.....
Get a clue, dummy. In order to get 277/480v from the power co. it's gonna
be 3
phase. Obviously you have NO conception of how single phase power is
derived
from 3 phase power.
.........DAMN........I'M IMPRESSED.........
**** off, you imbecile--and just see how far you get by calling people
names.
The OP never mentioned 277 volts....YOU DID THIS,
NO, you brought up the 277 first, and didn't even realize it.
Do you remember saying this (it's quoted above)?:
"At any rate, a better description IMO would have been something like
a two wire service, usually one phase of a three phase supply."
If you have, in your words, "a two wire service", and ONE of the wires
is "one phase of a three phase supply", the OTHER wire of the "two
wire service" is the NEUTRAL. One phase to ground IS 277 volts on the
system that I mentioned.
ostensibly as an excuse to
call someone a "dummy".....But if I want 277v though, I certainly dont have
to derive it from a polyphase system.....
Again, voltage has nothing to do with it. Single phase is nothing more than
a single a/c circuit, you scope it and it alternates between a high and a
low voltage.
Like Chris said, scope two phases of a 3 phase system......the
waveforms combine to make a SINGLE waveform.
You only have a single phase.....this is as opposed to a polyphase
system....
http://dictionary.reference.com/sear...gle-phase&r=67
[
1 entry found for single-phase.
sin·gle-phase (snggl-fz)
adj.
Producing, carrying, or powered by
]
The voltage can be changed easy enough with transformers--run it here....run
it there....isolate it....center tap it, its split phase---but STILL, SINGLE
PHASE......makes no differance how it was derived.......use an old telephone
crank for all I care......
I could care less how it is derived, however if you get it from the
power co., its gonna be 3 phase. The OP stated that he was familiar
with 3 phase power, so gee, a discussion of how to derive single-phase
480 from a 277/480 volt 3 phase Wye connected system didn't seem OT to
me. When discussing a 277/480 system, it doesn't hurt to also mention
that 277v SINGLE-phase can also be derived from line-to-neutral while
stating that the 480 single-phase is line-to- line.
.....snip....
And by the way, anyone who knows diddly squat about power
distribution is
likely not very impressed at your obvious attempts at further clouding
the
issue by your rattling off various types of three phase service, bringing
in
line to line and center tap voltages, control transformers, streetlight
wiring and all the rest of the irrevelant crap.
I should have known that a moron like you couldn't understand basic
electric
disribution.
Gee Wally, if it were _that_ far off OT, where do you think a lot of
people get those kind of lights for growing reefer (AS WAS PREVIOUSLY
DICUSSED)????????
Can you say 480volt SINGLE-PHASE ballasts from parking lot lights that
Sparkies threw away when they were installing new lights?
You havent a clue as to what I might or might not understand, and your doing
yourself no favors by continuing with the name calling here.
Looks like YOU are the one who started with the name calling. Is this
NOT what you said to me in alt.hvac just 6 days ago after displaying
more of your ignorance about electrical matters???????????????:
Message-ID:
"PrecisionMachinisT" wrote in message
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" "volts500" wrote in message
om...
wrote in message
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On 11 Jul 2004 09:23:35 -0700, (Thomas) wrote:
This is not a home owner help forum.
Try alt.home.repair
Right. It's a hang out for dumbass residential service flex duct boys and
Certified master electrician's who don't know how to determine the correct
wire size for AC units.
"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.
SVL"
Looks like YOU are the one who needs to **** off.
.......snip.....
You can fool some of the people some of the time.....
and you can get a job as a commercial/industrial electrician sometime
and find out real fast that 480 volts single-phase derived from a 3
phase 480v system is any two phases line-to-line.
http://www.allaboutcircuits.com/vol_2/chpt_10/1.html
"The term "single phase" is a counterpoint to another kind of power system
called "polyphase" which we are about to investigate in detail."
"Single phase power systems are defined by having an AC source with only one
voltage waveform."
Doh!!!
How many times do you have to be told? When two phases of a 3 phase
system are combined, THE RESULT IS A SINGLE VOLTAGE WAVEFORM?