Wiring 6 transformers 11v primarys to 220vac


  #1  
Old 12-02-13, 02:57 PM
C
Member
Thread Starter
Join Date: Dec 2013
Location: usa
Posts: 5
Received 0 Votes on 0 Posts
Wiring 6 transformers 11v primarys to 220vac

Name:  transformers.jpg
Views: 764
Size:  14.8 KB

is this the rightway to wire these up?
 
  #2  
Old 12-02-13, 04:12 PM
ray2047's Avatar
Member
Join Date: Mar 2006
Location: USA
Posts: 33,575
Received 14 Votes on 12 Posts
If the green wire is really a neutral not a ground and is gray or white, yes but you have 240v if this is U.S. and the result will be 120 on each primary. You must use either a 2-pole breaker or two handle tied single pole breaker if this is hard wired. If it is plug in you must run a 120/240 feed from a 2-pole breaker to an appropriate 4-wire receptacle.
 
  #3  
Old 12-02-13, 05:26 PM
C
Member
Thread Starter
Join Date: Dec 2013
Location: usa
Posts: 5
Received 0 Votes on 0 Posts
Thanks for the reply. currently i have a 3 wire 12/2 cable. two 12awg hot wires with ground. i need to upgrade to a 12/3 with ground. I was hoping this would work. This is the only way i knew to do it....
 
  #4  
Old 12-02-13, 05:32 PM
PJmax's Avatar
Group Moderator
Join Date: Oct 2012
Posts: 68,799
Received 2,677 Votes on 2,429 Posts
No.... currently you have a two wire cable with ground. In that application you cannot use the bare ground wire as a neutral.

When you upgrade to a three wire cable. You'll have half the transformers on red and white and the other half of the transformers on black and white. The bare wire will be a true ground for them.
 
  #5  
Old 12-02-13, 05:47 PM
C
Member
Thread Starter
Join Date: Dec 2013
Location: usa
Posts: 5
Received 0 Votes on 0 Posts
this isnt hard wired to the breaker box. its a 12/2 with ground SOOW cable into a 220v receptacle
 
  #6  
Old 12-02-13, 05:58 PM
ray2047's Avatar
Member
Join Date: Mar 2006
Location: USA
Posts: 33,575
Received 14 Votes on 12 Posts
its a 12/2 with ground SOOW cable into a 220v receptacle
Actually that would be 12-3 SOOW* and you need 12-4 SOOW on a 120/240 4 wire circuit. Assuming 30 amps or less you need a NEMA 14-30 receptacle and plug.

*Technically no ground, just conductors. one of which is green insulated in equipment cords such as SOOW. Feeder cable such as NM-b does have a ground but it is not counted.
 
  #7  
Old 12-02-13, 06:04 PM
C
Member
Thread Starter
Join Date: Dec 2013
Location: usa
Posts: 5
Received 0 Votes on 0 Posts
thanks for the help guys...
 
  #8  
Old 12-02-13, 06:09 PM
ray2047's Avatar
Member
Join Date: Mar 2006
Location: USA
Posts: 33,575
Received 14 Votes on 12 Posts
So what are you planing to do?
 
  #9  
Old 12-02-13, 06:34 PM
C
Member
Thread Starter
Join Date: Dec 2013
Location: usa
Posts: 5
Received 0 Votes on 0 Posts
this is going to be a 200 amp power supply for a solid state ampifier for ham radio. I am a ham operator.
 
 

Thread Tools
Search this Thread
 
Ask a Question
Question Title:
Description:
Your question will be posted in: