Generators and Motors
[Home] - [HELP] - [Forums] - [Library] - [Photo Gallery] - [Groups] - [Classified Ads] - [Subscribe] - [Links] - [Books] - [Sponsors] -

Go Back   SmokStak > SmokStak® Vintage Electrical Equipment > Generators & Electric Motors General Discussion > Onan Generators
Forgot Password? Join Us!

Notices

Onan Generators Restoring, operating and maintaining vintage Onan generators.

Onan Generators

Onan 12.5JC Sorting it Out


this thread has 55 replies and has been viewed 1302 times

Reply
 
Thread Tools Display Modes
  #51  
Old 02-10-2018, 07:51:51 PM
consolenut consolenut is offline
Registered-I
 
Join Date: Oct 2017
Location: Bristol, Tennessee / Broken Arrow, Oklahoma
Posts: 168
Thanks: 9
Thanked 43 Times in 35 Posts
Default Re: Onan 12.5JC Sorting it Out

But the incorrect jumper alignment. Could it have caused the voltage issues I was describing earlier. I have since changed it V1 & V4 per the diagram.

However the weather isn't cooperating now to do anymore work on it today.
Reply With Quote
Sponsored Links
  #52  
Old 02-11-2018, 10:51:18 AM
Wayne 440 Wayne 440 is offline
Registered-III
 
Join Date: Nov 2004
Location: Kentucky
Posts: 5,491
Thanks: 332
Thanked 4,609 Times in 2,189 Posts
Default Re: Onan 12.5JC Sorting it Out

Here you go- ref your PM.
Attached Thumbnails
Click image for larger version

Name:	voltage adj.jpg
Views:	40
Size:	140.1 KB
ID:	302867  
Reply With Quote
The Following 3 Users Say Thank You to Wayne 440 For This Post:
  #53  
Old 02-11-2018, 05:00:44 PM
armandh armandh is offline
Sponsor
 
Join Date: Aug 2006
Location: Suburban St. Louis, Missouri
Posts: 2,769
Thanks: 185
Thanked 677 Times in 544 Posts
Default Re: Onan 12.5JC Sorting it Out

Quote:
Originally Posted by consolenut View Post
So which drawing are you referring to armandh
the ones on the first page posts 1,2

post 1 numerates the neutral cluster
post 2 diagrams low Y with every winding reversed from as connected

that will work

but yes I would do double delta or zig zag for US residential
__________________
.
by using this free advise, you, your heirs, etc
absolve, save, and hold harmless the advisor.
CAVEAT EMPTOR
YMMV
Reply With Quote
The Following User Says Thank You to armandh For This Post:
  #54  
Old 02-11-2018, 07:48:58 PM
consolenut consolenut is offline
Registered-I
 
Join Date: Oct 2017
Location: Bristol, Tennessee / Broken Arrow, Oklahoma
Posts: 168
Thanks: 9
Thanked 43 Times in 35 Posts
Default Re: Onan 12.5JC Sorting it Out

Thanks for your help guys. I do have one question. I have a 50 amp RV plug in my power panel. It has 2 hots a neutral and ground as described in the link below. It has and requires a neutral connection. If I send L-0 to ground in the generator control box. Where will my neutral connection be from the generator to the panel. As im assuming i need one. On my 6.5 my neutral and ground were tied together and connected to the neutral bar in my power panel. Any help appreciated

http://www.myrv.us/electric/Pg/50amp_Service.htm
Reply With Quote
  #55  
Old 02-11-2018, 10:34:31 PM
consolenut consolenut is offline
Registered-I
 
Join Date: Oct 2017
Location: Bristol, Tennessee / Broken Arrow, Oklahoma
Posts: 168
Thanks: 9
Thanked 43 Times in 35 Posts
Default Re: Onan 12.5JC Sorting it Out

Thanks for your help. I'm gone. It seems everything Im reading the JC won't work in the configuration I want. So its off to the scrap yard this week. I'll stick to my 6.5NH.

Mods. Please feel free to close thread
Reply With Quote
  #56  
Old 02-12-2018, 01:08:55 AM
Wayne 440 Wayne 440 is offline
Registered-III
 
Join Date: Nov 2004
Location: Kentucky
Posts: 5,491
Thanks: 332
Thanked 4,609 Times in 2,189 Posts
Default Re: Onan 12.5JC Sorting it Out

There are literally thousands of JC sets in operation in just the configuration you seek. I would like to see whatever it is that you are reading that states otherwise. Of course, if I was closer, I would try to get between you and the "scrap yard".
Reply With Quote
The Following User Says Thank You to Wayne 440 For This Post:
Reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

F o r u m Jump


Use "Ctrl" mouse wheel to change screen size.
All times are GMT -4. The time now is 02:29:58 AM.

Smokstak and Enginads site search!


All use is subject to our TERMS OF SERVICE
SMOKSTAK® is a Registered Trade Mark - A Community of Antique Engine Enthusiasts
Copyright © 2000 - 2016 by Harry Matthews P.O. Box 5612 - Sarasota, FL 34277