480/277

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jociha

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I have a friend who is head of maintance a a building i sometimes do work at. He asked me to explain to him in english how you get 480 when measureing across 2 legs of 277? He thinks you would get 554v.Anyone want to take a shot at this one. john
 
One way to see in it a real form is to drive a stake in the ground (call this "A") walk 277 feet and drive another stake at this location. (call this "B") Go back to the first stake ("A") and at walk another 277 feet at a 120 deg angle and drive a stake here. (call this "C") Measure from "C" to "B"

Roger
 
roger said:
One way to see in it a real form is to drive a stake in the ground (call this "A") walk 277 feet and drive another stake at this location. (call this "B") Go back to the first stake ("A") and at walk another 277 feet at a 120 deg angle and drive a stake here. (call this "C") Measure from "C" to "B"

Roger
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I think your first post nailed it.
 
Most of it has to do with I?R losses and eddy currents.




j/k
:D

Rogers ### x 1.732 is the answer
 
John, in a single-phase system, one hot wire hits the peak + voltage (relative to the neutral) at the same time the other hot wire hits the peak - voltage, so the voltages add to twice one of them.

In 3-phase systems, one wire hits the + peak before another hits - peak and after the third hits - peak. Because the opposing peaks are offset in time, they add to less than two times one of them.
 
roger said:
One way to see in it a real form is to drive a stake in the ground (call this "A") walk 277 feet and drive another stake at this location. (call this "B") Go back to the first stake ("A") and at walk another 277 feet at a 120 deg angle and drive a stake here. (call this "C") Measure from "C" to "B"

Roger
Click to expand...
Does that work with 7,200? :grin:
 
If you had an isosceles triangle with two sides equaling 1 and separated by 120 degrees your missing side would be equal to the square root of 3 or 1.73.
 
infinity said:
If you had an isosceles triangle with two sides equaling 1 and separated by 120 degrees your missing side would be equal to the square root of 3 or 1.73.
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I think it has to be an equilateral triangle, an isosceles triangle may have only two equal sides which throws off the angles.
 
iwire said:
I think it has to be an equilateral triangle, an isosceles triangle may have only two equal sides which throws off the angles.
Click to expand...

2 legs from a delta configuration which is an equilateral triangle are different than the 2 legs from a wye configuration which form an isosceles triangle.
 
roger said:
One way to see in it a real form is to drive a stake in the ground (call this "A") walk 277 feet and drive another stake at this location. (call this "B") Go back to the first stake ("A") and at walk another 277 feet at a 120 deg angle and drive a stake here. (call this "C") Measure from "C" to "B"

Roger
Click to expand...

Roger just wants you to come drive the stakes for his new tractor shed:D
 
iwire said:
I think it has to be an equilateral triangle, an isosceles triangle may have only two equal sides which throws off the angles.
Click to expand...


An equilateral will have all three sides the same therefore the angles would all have to be 60 degrees. An isosceles will have two sides the same which would allow one angle to be 120 degrees.
 
iwire said:
I'm lost but I will take your word for it. :confused:
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You guys are talking about two different triangles... infinity - red... iwire - blue... but both your triangles have a common side - green.

trianglescommonside.gif


.
 
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