ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
ShoutChat Box
Recent Posts
Look at this mess...
by Trumpy - 11/07/19 11:48 PM
Fire source!
by sabrown - 11/07/19 08:39 AM
Parallel Conductor Divisor
by LongRunner - 11/04/19 02:21 AM
FPE in Germany
by Texas_Ranger - 10/29/19 05:12 AM
Mistake in Instructions?
by gfretwell - 10/28/19 06:36 PM
New in the Gallery:
FPE Breaker panel in germany
What is this for?
Who's Online Now
0 registered members (), 4 guests, and 9 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
Page 1 of 2 1 2
Single phase and what you call it. #219479 07/30/18 08:18 PM
Joined: Jul 2004
Posts: 9,411
G
gfretwell Offline OP
Member
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 05:36 PM
Joined: Mar 2004
Posts: 947
T
twh Offline
Member
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 11:55 AM
Joined: Apr 2002
Posts: 7,121
HotLine1 Offline
Member
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 11:57 AM
Joined: Apr 2002
Posts: 7,121
HotLine1 Offline
Member

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 08:18 PM
Joined: Jul 2007
Posts: 1,335
S
sparkyinak Offline
Member
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 09:17 PM
Joined: Jul 2004
Posts: 9,411
G
gfretwell Offline OP
Member
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 01:12 PM
Joined: Apr 2002
Posts: 7,121
HotLine1 Offline
Member
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
Re: Single phase and what you call it. [Re: gfretwell] #219616 09/11/18 08:38 PM
Joined: Mar 2004
Posts: 749
B
BigB Offline
Member
How about "It's a two way switch" or calling a 4 gang a "four way" or when the electricity stops it's a "short" or "I need two-twenty" or "I need a 200 volt upgrade"

Re: Single phase and what you call it. [Re: gfretwell] #219617 09/12/18 04:44 AM
Joined: Oct 2000
Posts: 5,383
S
sparky Offline
Member
I found this dictionary , but it appears in need of some updating>>>


Quote
Phase.
In wave motion, oscillating motion, simple harmonic motion, or similar
periodic phenomena, the interval of time passed from the time the moving
particle moved through the middle point of its course to the instant
when the phase is to be stated


~S~

Re: Single phase and what you call it. [Re: BigB] #219749 11/07/18 01:05 AM
Joined: Aug 2006
Posts: 81
A
Albert Offline
Member
Or the fact that in plumbing, an "open" valve allows flow and a "closed" valve stops it, while for electrical switches it's the opposite!

Page 1 of 2 1 2

Featured:

2020 National Electrical Code
2020 National Electrical
Code (NEC)

* * * * * * *

2017 Master Electrician Exam Preparation Combos
2017 NEC Electrician
Exam Prep Combos:
Master / Journeyman

 

Member Spotlight
HCE727
HCE727
Delaware County, PA, USA
Posts: 186
Joined: November 2005
Show All Member Profiles 
Top Posters(30 Days)
BigB 5
NORCAL 1
Popular Topics(Views)
260,597 Are you busy
195,467 Re: Forum
184,784 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.7.3