wire size

I am putting in a new elect stove. The stove I have in place is hooked up to a 30 amp breaker with #10 wire. The new stove will have a 40 amp breaker with #8 wire. What I would like to know is since the new stove will have a convection oven with heating elements is this ok.

 

If the oven manuf states 40A breaker and #8 awg wire, then its fine.

 

The manufacture has not recommended anything, I haven't got the specs . I was just wondering if that was the right way to do it.

 

II. Branch-Circuit Ratings
210.19 Conductors — Minimum Ampacity and Size.
(A) Branch Circuits Not More Than 600 Volts.
(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 83/4 kW or more rating, the minimum branch-circuit rating shall be 40 amperes.

COMMENTARY;
Notice the last statement calling for a 40 amp 8 awg copper or 6 awg aluminum branch circuit conducot per Table 310.16 for a 40 amp rated conductor.

Also be aware that the NEC requires a black, red, white, and bare for a new range branch circuit installation.

I recommend 6 awg copper four wire branch circuit cable on a 50 or 60 amp breaker.

If you have the manufacturer's instructions you should confirm the above matches what it says. If you have no manufacturer's instructions then the above would apply.

Good Luck

Wg