ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
ShoutChat
Recent Posts
How's Florida doing with Hurricane Ian?
by Bill Addiss - 09/28/22 12:41 PM
Tough being a lineman's kid
by Bill Addiss - 09/28/22 12:39 PM
GFCI's pops in large numbers
by dsk - 09/26/22 04:35 AM
AFCI’s Revisited
by sparky - 09/24/22 09:58 AM
NFPA Price Increase Coming
by Bill Addiss - 09/23/22 02:22 PM
New in the Gallery:
240/208 to a house
240/208 to a house
by wa2ise, October 9
Now you know.
Now you know.
by Tom_Horne, September 7
Who's Online Now
0 members (), 46 guests, and 20 robots.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
Page 1 of 2 1 2
#11941 07/27/02 11:14 AM
Joined: Aug 2001
Posts: 545
A
aldav53 Offline OP
Member
In a 3 Phase service I have seen 240v between phases and a 208 to ground wild leg, What are some other combinations and where do they use the wild leg?


The Golden Rule - "The man with the gold makes the rule"
#11942 07/27/02 12:26 PM
Joined: Apr 2002
Posts: 2,527
B
Moderator
Search for high leg (27 hits) or 4-wire delta (4 hits) at this site.

Note that “Bø” {or sometimes Cø} can also be called Stinger / Red / Orange / Purple / Power / Wild / Bastard / High Leg

Read through Scott35’s 3 Phase Delta Transformer Schematics in Technical Reference Area of this board.

Also see: home.att.net/~benmiller/elecsys.htm

Utility availability of this service type is usually limited to small, remote overhead systems.

Other non-symmetrical 3ø configurations are the corner-grounded variety.




[This message has been edited by Bjarney (edited 07-27-2002).]

#11943 08/02/02 11:26 AM
Joined: Aug 2001
Posts: 545
A
aldav53 Offline OP
Member
I was unable to find any data in the technical Reference area.


The Golden Rule - "The man with the gold makes the rule"
#11944 08/02/02 12:38 PM
Joined: Oct 2000
Posts: 4,067
Likes: 3
Member
Al,

Did you set the selection to see all topics?
We are working on a way to have them continuously visible regardless of date, but this works for now. Look at the thread in that area for Instructions if you're not sure what I mean.

Bill


Bill
#11945 08/02/02 07:08 PM
Joined: Aug 2001
Posts: 545
A
aldav53 Offline OP
Member
Yep, I tried that, no subjects come up.


The Golden Rule - "The man with the gold makes the rule"
#11946 08/02/02 07:22 PM
Joined: May 2001
Posts: 717
G
Member
Alda,
The wild leg is ONLY useful in configurations that do not require a neutral, such as 3 phase equipment, or 240 volt loads with no neutral, otherwise you burn it up.

You ONLY have a high leg in Delta systems (open or closed) because you tap mid phase of one coil (between A and C)

That's why the Wye is the popular form today, it creates no high leg and all 3 phases are useful with the neutral.

You often see 199 volt high legs, this is from 230 volt systems. Phase to ground voltage of A or C phase X 1.732 = phase to B voltage.

#11947 08/02/02 07:57 PM
Joined: Oct 2000
Posts: 4,067
Likes: 3
Member
Al,

Take a look to see if this is what you are looking for.
https://www.electrical-contractor.net/ubb/Forum15/HTML/000054.html

Bill


Bill
#11948 08/02/02 08:49 PM
Joined: Oct 2000
Posts: 5,392
S
Member
'Wild leg' is no longer the term i like.

Has you ever yelled out

got the WILD LEG'

in a crowded store or mall???

[This message has been edited by sparky (edited 08-02-2002).]

#11949 08/04/02 03:22 AM
Joined: Aug 2001
Posts: 545
A
aldav53 Offline OP
Member
Thanks for the answers, Bill great transformer drawings, but still not sure where they are used. On a 3ph system 240v between phases and measuring "120v to grd, 120v to gnd, and 208 to gnd", where would the 208v to gnd be used?


The Golden Rule - "The man with the gold makes the rule"
#11950 08/04/02 08:20 AM
Joined: Jul 2002
Posts: 175
E
Member
Aldav53,

The high leg (208 to ground) exists as a result of the center tap, but is not used to supply loads.

Ed

Page 1 of 2 1 2

Link Copied to Clipboard
Featured:

Tools for Electricians
Tools for Electricians
 

* * * * * * *

2020 Master Electrician Exam Preparation Combos
2020 NEC Electrician
Exam Prep Combos:
Master / Journeyman

 

Member Spotlight
HappyElectrician
HappyElectrician
Penn USA
Posts: 31
Joined: December 2011
Top Posters(30 Days)
Popular Topics(Views)
297,481 Are you busy
228,307 Re: Forum
213,194 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.7.5