Residential Cooking Appliances

Status
Not open for further replies.
S

speedypetey

Senior Member
Location
Hudson Valley, NY
How do you guys size branch circuits for residential ranges?
Do you use 220.19 and put anything under 12.5kw on a 40 amp, #8 circuit? OR do you size it at (100% or) 125% of the continuous load?
I don't like the 220.19 interpretation since it continually uses the terms "calculated" and "computed", referring to load calcs not branch circuit requirements.
This has become a contentious issue and need to resolve it.
 
Re: Residential Cooking Appliances

210.19(3) Household Ranges and Cooking Appliances. Branch-circuit conductors supplying household ranges, wall-mounted ovens, counter-mounted cooking units, and other household cooking appliances shall have an ampacity not less than the rating of the branch circuit and not less than the maximum load to be served. For ranges of 8? kW or more rating, the minimum branch-circuit rating shall be 40 amperes.

210.23(C) 40- and 50-Ampere Branch Circuits. A 40- or 50-ampere branch circuit shall be permitted to supply cooking appliances that are fastened in place in any occupancy. In other than dwelling units, such circuits shall be permitted to supply fixed lighting units with heavy-duty lampholders, infrared heating units, or other utilization equipment.
 
Re: Residential Cooking Appliances

Speedy around here I do not remember a branch circuit for a range that was not a 50 amp circuit.
 
Re: Residential Cooking Appliances

In the handbook it specifically states to use 220.19 for sizing the branch circuit for household cooking appliances. Even though 220.19 is used for demand calculations.
I only read this in the handbook this morning when I got to the shop. I don't agree with it but that is the layman's explanation. :roll:
 
Re: Residential Cooking Appliances

You will never max out at the appliances kw rating. The heating elements will never all be on full power at the same exact time. To spare myself the calculations, I usually just go with the nameplate rating of the appliance.

[ January 21, 2004, 09:02 PM: Message edited by: electricmanscott ]
 
Re: Residential Cooking Appliances

Around here everybody installs a 50A circuit. Then you are covered for future changes. :cool:
 
Re: Residential Cooking Appliances

When I install a range, I ask the GC or the architect for a cut sheet for the appliance(s). Then I wire accordingly - sometimes 40 amperes, sometimes 50 amperes. Today there are more 50s than 40s.

Pierre
 
Status
Not open for further replies.
Top