Line voltage bucking transformer question

[martin manning]

She's a come-on girl. Leave you cryin' in the night.

[JazzGuitarGimp]

Looks to me like (s)he's more into selling shoes than building amps!

[TUBEDUDE]

I thought power generation was 3 phase, each 120deg. phased from the other. Even though only 2 may have gone to the house. Thus 208=240 phase corrected. But ICBW.

[martin manning]

I believe typical residential power takes one of the three phases into a transformer with a CT secondary. That transformer creates the 240 single phase and 120 split-phase (180 degrees apart) with grounded neutral.

[TUBEDUDE]

Ah so! Thanx for the clarification Manning-san. I am once again humbled by my incomplete knowledge.

[JazzGuitarGimp]

I've never been sure about the HV distrubution, whether it is three phase or single phase. It might depend on the neighborhood. But yes, the transformer on the pole has a single phase primary with multiple taps, so they can compensate for line losses and loading along the way. The secondary is 240V CT coming down to the house. The CT is grounded at the point of entry, which is usually at the breaker box.

[NickC]

Go easy on Suzanne. She quoted me verbatim in a other post, making her my first official disciple.

Yeah, is it really necessary to go all "Fire & Rain" on Suzanne?

Suzanne, the plans they made
Put an end to you

!