What size breaker for 4100 watt wall oven?


Old 09-14-09, 11:29 PM
Thread Starter
Join Date: Aug 2009
Location: Northern California
Posts: 130
Received 0 Votes on 0 Posts
What size breaker for 4100 watt wall oven?

I just installed a new wall oven which the nameplate states it draws 4.1kW. I believe the cable supplying the jbox to the oven is 8/3 AL (based on the size of the conductors and the 30 amp breaker its connected to). Is a 30 amp breaker ok to use for this oven? The manual states that for 4800 watts and less they recommend using a 20 amp breaker.

FPEW2785KF The breaker recommendations are on page 3.

Are you not supposed to load a dedicated (or otherwise) circuit to more than 80%?


So the oven only draws a fraction over 17 amps, but 80% of a 20 amp circuit would only be 16 amps. So is the next breaker size of up 30 amps the right one to use?
Sponsored Links
Old 09-15-09, 04:27 AM
Join Date: Jun 2008
Location: VA.
Posts: 812
Received 1 Vote on 1 Post
You should follow the manufacturers instructions. My thinking on this is, this isn't considered a continuous load. Rarely one bakes for 3 hours or more.

Also, as the manual states:
Old 09-15-09, 08:09 AM
Forum Topic Moderator
Join Date: Feb 2005
Location: Near Lansing, Michigan
Posts: 10,943
Received 43 Votes on 41 Posts
The control board in the oven cycles the heating elements on and off thus making it a non-continuous load.

210.19(A)(3) Household ranges and cooking appliances. Branch circuit conductors supplying [...] household cooking appliances shall have an ampacity [...] not less than the maximum load to be served. [irrelevant sections removed]
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:
Your question will be posted in: