any here know electricity or an electrician?

[Denny]

No problem. I'm not a licensed electrician, but I manage a few. I have to know enough to be dangerous and to fool my subordinates.

[jw33]

BBC final answer, and all that shit needs a haircut...

[lowthreeohz]

lol yeah trim those stragglers!

[fordracing19]

bbc

[HarrisonTX]

It's BBC

[STANGGT40]

BBC...now, go ask your teacher what readings you'll get from line to line and line to ground on each leg of a 480 volt corner ground delta system.

[Geor!]

bbc...now, go ask your teacher what readings you'll get from line to line and line to ground on each leg of a 480 volt corner ground delta system.

1528

[crooner]

BBC...now, go ask your teacher what readings you'll get from line to line and line to ground on each leg of a 480 volt corner ground delta system.

L1 to L2 = 480
L2 to L1 = 480
L3 to L2 = 480

L1 to G = 240
L2 to G = 480
L3 to G = 240

Right? Delta has a high-leg and it should be B Phase?

[STANGGT40]

L1 to L1 = 480
L2 to L2 = 480
L3 to L3 = 480

L1 to G = 240
L2 to G = 480
L3 to G = 240

Right? Delta has a high-leg and it should be B Phase?

well, first off, you'll never get voltage by testing a leg to itself, so L1 to L1, L2 to L2, etc won't read anything.

it's sort of a trick question. i'm sure you can find info on it, if you do a search, but one of the phases is actually grounded, so you'll have a 0 volt reading to ground on that phase. ie; 2 of the phases will read 480v to ground, but the grounded phase will read 0 volts to ground, but 480v phase to phase.

[crooner]

well, first off, you'll never get voltage by testing a leg to itself, so L1 to L1, L2 to L2, etc won't read anything.

it's sort of a trick question. i'm sure you can find info on it, if you do a search, but one of the phases is actually grounded, so you'll have a 0 volt reading to ground on that phase. ie; 2 of the phases will read 480v to ground, but the grounded phase will read 0 volts to ground, but 480v phase to phase.

Doh I posted that too fast and didn't proof read. I meant phase to phase L1 to L2 ect..... I know phase to phase is nothing going to the same phase. I just didn't proof read.

[crooner]

well, first off, you'll never get voltage by testing a leg to itself, so L1 to L1, L2 to L2, etc won't read anything.

it's sort of a trick question. i'm sure you can find info on it, if you do a search, but one of the phases is actually grounded, so you'll have a 0 volt reading to ground on that phase. ie; 2 of the phases will read 480v to ground, but the grounded phase will read 0 volts to ground, but 480v phase to phase.

Is that also considered a ghost leg? Never seen one but have heard of them.

[STANGGT40]

Is that also considered a ghost leg? Never seen one but have heard of them.

yes sir; i've heard people refer to the grounded phase as a "ghost leg". it's funny, because it really baffles a lot of electricians...most have never seen or even heard of it.

[line-em-up]

...

Based on the wire color, BBC. The red and black legs are hot, each with 120 volts out of phase. The ground and neutral should read almost the same, except for the voltage drop along the neutral.
The thing that I've never clearly understood with commercial ac is the phase differences (single, 2, 3) and how they affect the voltages. Wouldn't the example they give be a 2-phase circuit? Each 120V leg being a phase?

[GrayStangGT]

B
b
c

Yup

[jw33]

Based on the wire color, BBC. The red and black legs are hot, each with 120 volts out of phase. The ground and neutral should read almost the same, except for the voltage drop along the neutral.
The thing that I've never clearly understood with commercial ac is the phase differences (single, 2, 3) and how they affect the voltages. Wouldn't the example they give be a 2-phase circuit? Each 120V leg being a phase?

Yeah sometimes it's refered to as split or dual phase.