ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Shout Box
Recent Posts
diazed fuses
by annemarie1. 02/23/18 05:20 PM
Solid state relay or not
by ghost307. 02/23/18 03:17 PM
Whirlpool Recalls KitchenAid Electric Kettles
by Admin. 02/22/18 11:35 AM
110.26
by gfretwell. 02/18/18 12:14 AM
New in the Gallery:
Housebilding DIY wiring
SE cable question
Who's Online Now
1 registered members (sparky), 12 guests, and 10 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
Services #55092
08/13/05 11:02 PM
08/13/05 11:02 PM
A
acreviver  Offline OP
Junior Member
Joined: Aug 2005
Posts: 1
McBee S.C. U.S.A.
I was asked the question what the difference between an "Open Delta Sevice and a Yankee or Y Service" was. I've looked in the code book and asked more than 5 electrician's and haven't gotten a definite answer. I was wondering if anybody out there could help me. I live in South Carolina, don't know if that makes a differance.

Work Gear for Electricians and the Trades
Re: Services #55093
08/13/05 11:17 PM
08/13/05 11:17 PM
G
gfretwell  Offline

Member
Joined: Jul 2004
Posts: 9,180
Estero,Fl,usa
Wye is where the 3 phases are referenced to a central grounded point, looks like a "Y". That is your normal 208.

Open delta, delta "Vee" etc is a delta that skips one of the transformers. Imagine a triangle where you erased one of the sides. That is typically 240v and they centertap one of the secondaries for the ground.
The voltages will be 120/120/208 to ground and 240 between phases.
Open delta is a cheap way to serve a place that needs 3 phase and also 120v since it only takes 2 transformers.
Balancing the phases can be tricky but if done well it works.


Greg Fretwell
Re: Services #55094
08/14/05 08:57 AM
08/14/05 08:57 AM
T
Tiger  Offline
Member
Joined: May 2005
Posts: 706
Crystal Lake, IL USA
Ckeck out the Technical Reference section of this site for schematics of different services.

Dave


Featured:

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

 

Member Spotlight
BEAMEUP
BEAMEUP
WA
Posts: 27
Joined: December 2004
Show All Member Profiles 
Top Posters(30 Days)
Admin 9
Popular Topics(Views)
244,072 Are you busy
181,061 Re: Forum
171,308 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.6.1
(Release build 20180101)
Page Time: 0.011s Queries: 14 (0.003s) Memory: 0.9500 MB (Peak: 1.0759 MB) Zlib enabled. Server Time: 2018-02-24 00:31:39 UTC