The Electrical Contractor Network

ECN Electrical Forum
Discussion Forums for Electricians, Inspectors and Related Professionals

Books, Tools and Test Equipment for Electrical and Construction Trades

Register Now!

Register Now!

We want your input!


2017 NEC and Related
2017 NEC
Now Available!

Recent Posts
Parking lot pole light swap....
by gfretwell
10/24/16 08:46 PM
International Wire Colour Codes
by Tjia1981
10/23/16 12:08 PM
Son of Sparky
by HotLine1
10/20/16 07:43 PM
Speaking of Plugmold ...
by gfretwell
10/17/16 02:37 PM
Broken battery charger? Check for cobwebs!
by gfretwell
10/17/16 02:30 PM
New in the Gallery:
12.5A through 0.75mm˛ flex (just out of curiosity)
Shout Box

Top Posters (30 Days)
gfretwell 14
HotLine1 7
ghost307 7
renosteinke 6
Potseal 4
Who's Online
0 registered (), 338 Guests and 5 Spiders online.
Key: Admin, Global Mod, Mod
Topic Options
Rate This Topic
#128224 - 10/17/02 09:53 PM Discussion- Zig-Zag Grounding Transformers
Scott35 Offline

Broom Pusher and

Registered: 10/19/00
Posts: 2724
Loc: Anaheim, CA. USA
This thread can be used to discuss the drawings posted in the Technical Reference area intitled:

Zig-Zag Grounding Transformers

Feel free to ask question(s), make comments or discuss this topic in detail.

If you would like these or other drawings from the Technical Reference area sent to you as Raster Images [.gif, .jpg, .bmp], as Metafiles [.wmf], or as AutoCAD R14 files [.dwg], contact me via e-mail or post a message in this thread.
Please specify which type of file format you would like, along with the name of drawing / text .
The images / text will be sent via ".ZIP" compressed file, using PKZIP 2.60 for Windows / DOS. If needed, I can send as Self Extracting Zip files, which work fine in Windows 95, 98, Me, NT4 and 2000 Enviroments, but have not worked correctly under Windows XP as of 08.01.2002.

Let me know if these drawings are helpful or if they suck!

Scott S.E.T.

[This message has been edited by Scott35 (edited 10-18-2002).]
Scott " 35 " Thompson
Just Say NO To Green Eggs And Ham!

#128225 - 12/02/02 02:47 PM Re: Discussion- Zig-Zag Grounding Transformers
sparky Offline

Registered: 10/18/00
Posts: 5545
a noodle is created, so the definition of SDS comes to mind, and the 'no direct electrical connection' angle commonly debated.

#128226 - 12/03/02 09:49 AM Re: Discussion- Zig-Zag Grounding Transformers
Bjarney Offline

Registered: 04/10/02
Posts: 2561
Loc: West-Southern Inner-Northeast ...
It may be worth noting that the voltage across each inividual coil in a non-fault condition is 0.5774 of the phase-to-neutral voltage, so, for 480Y/277V, each coil operates at 160 volts.

#128227 - 02/07/07 03:00 PM Re: Discussion- Zig-Zag Grounding Transformers
Trumpy Offline


Registered: 07/05/02
Posts: 8532
Loc: SI,New Zealand
Those are very good diagrams, even an idiot like me can see how the Zig-Zag connection works!.
Let's face it, these days if you're not young, you're old - Red Green grin


ECN Electrical Forums - sponsored by Electrical Contractor Network - Electrical and Code Related Discussion for Electrical Contractors, Electricians, Inspectors, Instructors, Engineers and other related Professionals