Bakrr: Meaning of 3 Wire

Reply

  #1  
Old 05-19-12, 05:19 PM
bakrr's Avatar
Member
Thread Starter
Join Date: Mar 2012
Location: Canada
Posts: 11
Bakrr: Meaning of 3 Wire

3 wire 120v to a single 20 amp breaker
3 wire would indicate 240v with a neutral wouldn't it?
 
Sponsored Links
  #2  
Old 05-20-12, 07:53 AM
CasualJoe's Avatar
Member
Join Date: Jan 2010
Location: USA
Posts: 9,385
3 wire would indicate 240v with a neutral wouldn't it?
3-wire could indicate many things including 120 volt as the OP said. 240 volt doesn't have a neutral.
 
  #3  
Old 05-20-12, 10:01 AM
SeaOn's Avatar
Member
Join Date: Dec 2011
Location: USA
Posts: 351
Bakrr: Meaning of 3 Wire
3 wire 120v to a single 20 amp breaker
3 wire would indicate 240v with a neutral wouldn't it?
Depends on who you are talking to! If you are talking to me, then this is how I see it.
3-wire in the field means 120/240. So: 3 wire=4 conductors>>>> two hots, one neutral, and one equipment ground. If you want a straight 240v, then you would have to be specific. The normal ordering of cable=14-3NMB/12-3NMB/ETC. ETC.. <<<Notice we never mention the 4th conductor. Reason: Itís assumed the 4th conductor is needed. Regardless, most electrical distributors ďmay" ask if you want it with ground. In my opinion, straight 240v should never be called three wire. We may call a straight 240v two wire, but we would need to be specific, or we will get 120v two wire with ground.
 
  #4  
Old 05-20-12, 11:53 AM
CasualJoe's Avatar
Member
Join Date: Jan 2010
Location: USA
Posts: 9,385
3 wire would indicate 240v with a neutral wouldn't it?
3-wire could indicate many things including 120 volt as the OP said. 240 volt doesn't have a neutral.
The thread where this appeared is gone, must have been deleted. That being said, as I recall, the context of the 3-wire stated by the OP was a 3-wire cord, SJT I believe it was. The green grounding conductor is counted when referring to cords such as this. Hence, a 12-3 SJ cord would have 1 blk, 1 Wht and 1 Grn conductor.
 
  #5  
Old 05-20-12, 12:54 PM
SeaOn's Avatar
Member
Join Date: Dec 2011
Location: USA
Posts: 351
Interesting!!!
 
  #6  
Old 05-20-12, 12:59 PM
ray2047's Avatar
Group Moderator
Join Date: Mar 2006
Location: USA
Posts: 33,044
The thread where this appeared is gone
Not gone but this was removed from it because it was non-beneficial and perhaps confusing within the context of the original thread http://www.doityourself.com/forum/el...ub-wiring.html.
 
  #7  
Old 05-21-12, 06:05 PM
CasualJoe's Avatar
Member
Join Date: Jan 2010
Location: USA
Posts: 9,385
It is a Morgan Spa and the wiring scheme advises that it is a 120v (3 wire) cord connected to a 20 amp breaker
Well, I did remember the cord part correctly, but not sure now why I thought it was an SJT cord.
 
Reply

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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Thread Tools
Search this Thread
Display Modes