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Single phase and what you call it. #219479
07/30/18 09:18 PM
07/30/18 09:18 PM
G
gfretwell  Offline
OP
Member
Joined: Jul 2004
Posts: 9,251
Estero,Fl,usa
Does anyone else have problems when they hear people call 120/240 1p "split phase" or even "2 phase"?

Yikes it sets my teeth on edge.

The problem is even Wikipedia and a few panel manufacturers use the term split phase in their documentation.
Split phase is one way to wire a motor and there is only one phase in your household panel with 2 ungrounded conductors derived from one 240v secondary that just happens to have a grounded center tap. It is simply single phase, nothing else.

... or am I just being too pedantic?


Greg Fretwell
Work Gear for Electricians and the Trades
Re: Single phase and what you call it. [Re: gfretwell] #219480
07/31/18 06:36 PM
07/31/18 06:36 PM
T
twh  Offline
Member
Joined: Mar 2004
Posts: 947
Regina, Sask.
What do you think of the term "three-way switch?"

What bugs me is putting the question mark inside the last quotation mark.

Re: Single phase and what you call it. [Re: gfretwell] #219482
08/01/18 12:55 PM
08/01/18 12:55 PM
HotLine1  Offline

Member
Joined: Apr 2002
Posts: 6,997
Brick, NJ USA
Greg:

Here is a link to "2 phase", courtesy of Scott35

https://www.electrical-contractor.n...&Number=148672&page=3#Post148672

It's buried in the Tech area.


John
Re: Single phase and what you call it. [Re: gfretwell] #219483
08/01/18 12:57 PM
08/01/18 12:57 PM
HotLine1  Offline

Member
Joined: Apr 2002
Posts: 6,997
Brick, NJ USA

I saw this only once, many, many years ago as a helping hand with one of the 'old timer' ECs in Philadelphia.

It was different, and scary back then.


John
Re: Single phase and what you call it. [Re: gfretwell] #219485
08/02/18 09:18 PM
08/02/18 09:18 PM
S
sparkyinak  Offline
Member
Joined: Jul 2007
Posts: 1,335
Alaska
If I'm not mistaken, it was used with street cars mainly back in the day. Not sure how or it's practicality


"Live Awesome!" - Kevin Carosa
Re: Single phase and what you call it. [Re: gfretwell] #219486
08/02/18 10:17 PM
08/02/18 10:17 PM
G
gfretwell  Offline
OP
Member
Joined: Jul 2004
Posts: 9,251
Estero,Fl,usa
Maybe somewhere but I think the streetcars in DC used 600vdc, picked up with a "plow" and the return was the track.


Greg Fretwell
Re: Single phase and what you call it. [Re: gfretwell] #219487
08/03/18 02:12 PM
08/03/18 02:12 PM
HotLine1  Offline

Member
Joined: Apr 2002
Posts: 6,997
Brick, NJ USA
I know it was not on any streetcars, it was n a house of worship in Center City. A sub-basement, way down below grade, and that made it scarier. Heck, if there was any issue, noone would have found us.


John

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