Load center terminology confusion

Reply

  #1  
Old 09-02-16, 07:51 AM
J
Member
Thread Starter
Join Date: Aug 2016
Posts: 13
Received 0 Votes on 0 Posts
Load center terminology confusion

Can someone explain what 40 circuit 30 space or 40 circuit 20 space means?
Never mind, I found my answer.
For others wondering:
in the case of 40 circuit - 30 space, you have a total of 30 breaker slots. 10 of those slots are able to accept tandem breakers. or in the 40 circuit - 20 space, all 20 slots can accept tandem breakers.

Tandem breaker picture[ATTACH=CONFIG]70379[/ATTACH]
 
Attached Images  

Last edited by Jon Mullins; 09-02-16 at 08:11 AM.
Sponsored Links
  #2  
Old 09-02-16, 08:10 AM
ray2047's Avatar
Member
Join Date: Mar 2006
Location: USA
Posts: 33,597
Received 13 Votes on 11 Posts
40-30 means 30 full size breakers for 30 circuits or 20 full size breakers and 10 tandem breakers for 40 circuits. Usually only 10 spaces are designated for tandems. Tandems aren't allowed and/or won't fit in the other spaces.

40-20 means you can have 20 full size breakers (20 circuits) or up to 20 tandem breakers for a total of 40 circuits.

Some panels also take quads but the explanation is similar. Quads allow for a pair of single pole breakers and a two pole breaker in the same device or four single pole..
 
  #3  
Old 09-02-16, 08:13 AM
J
Member
Thread Starter
Join Date: Aug 2016
Posts: 13
Received 0 Votes on 0 Posts
Thanks for the answer ray2047
 
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
 
Ask a Question
Question Title:
Description:
Your question will be posted in: