15 amp breaker with combo #12 and #14 wire

Reply

  #1  
Old 10-11-05, 07:49 PM
vt432
Visiting Guest
Posts: n/a
Question 15 amp breaker with combo #12 and #14 wire

My contractor wired outlets in a new room with #12 wire I had accessible. He conveniently left for me to complete to the breaker box. I wanted him to use #14 wire for the outlet receptacles as I had already run two 15 amp breakers and #14 wire from the breaker box into the basement room to be finished out. I left the 14 in an overhead box to tie into the receptacles later.
My question: is there an approved use of the 15 amp breaker with the 14 wire feeding several receptacles which are wired in series with #12 wire?
I have always used 20 amp breakers with #12 wire and 15 amp breakers with #14? Would a 20 amp braker be ok to feed the receptacles even though #14 wire is leaving the breaker into the room and possibly connecting to the #12 wire and receptacles.
I am trying to avoid replacing the breaker and having to rerun the feed wire through the floor.
 
Sponsored Links
  #2  
Old 10-11-05, 07:55 PM
Member
Join Date: Sep 2000
Location: United States
Posts: 18,497
Breakers are sized to be no larger than the ampacity of the smallest wire on the circuit. You may use a 15-amp breaker on any circuit that contains no wire smaller than #14. You may use a 20-amp breaker on any circuit that contains no wire smaller than #12.

Bottom line is that it is okay to use a 15-amp breaker on a circuit with some or all #12 wire, and it is not okay to use a 20-amp breaker on a circuit with any #14 wire at all.
 
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
'