30A circuit into a 15A

[imported_Ron]

I am trying to find if a gadget exists.
It appears after some research, that the electrician that wired my home, used a 30A 2pole breaker with 10/3 romex to my wall mounted oven. During roughin, the inspector had no comment because it was fine at that point. When the electrician installed the wall mounted oven, he realized that the seperate counter mounted stove top needed a 115V igniter circuit. (I assume he thought it was a combo oven stove top originally.) So now I find that one phase and the neutral (of the 10/3) land on a 15A receptacle laying under my counter mounted stove top. Then the feed through terminals on the recep. are used to continue with 12/3 to the wall mounted oven (wire nutting the then unused phase to continue to the oven).
So, Is there a box mounted OCPD that could be installed in a 4x4 box, that I could use to feel more comfortable about the 15A receptacle installed. I will replace the 12/3 with 10/3 from the recept box to the wall oven.
Suggestions.
BTW, the oven is 120/240V, 3.6kW.

[Wgoodrich]

The wall mounted oven needs 30 amp with 10/3wGrnd. The igniter of the gas cooktop needs to have power tapped from a kitchen receptacle. Unless your cooking branch circuit is rated 50 amps then a tap is not allowed by the NEC.

The 12/3 to the oven is too small, needs to be 10/3wGrnd serving that oven from the panel to the oven.

The cooktop needs to have a wire fished through your cabinets from a nearby counter kitchen receptacle with a receptacle placed in the cabinet under the gas stove top.

You have a NEC violation in your wiring design as you discribed.

Hope this helps

Wg

[imported_Ron]

Why can it be tapped if it is 50A? Code reference?

[Wgoodrich]

Boy your are on them you catch em right in the middle of the reply too, you must be reading closely. Try the following code reference copied section that should apply.

COPIED SECTION 2002 NEC

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.

Exception No. 1: Tap conductors supplying electric ranges, wall-mounted electric ovens, and counter-mounted electric cooking units from a 50-ampere branch circuit shall have an ampacity of not less than 20 and shall be sufficient for the load to be served. The taps shall not be longer than necessary for servicing the appliance.

WG COMMENTARY;

Notice the exception number 1 under 220.19.A.3

Let me know is this helps

Good Luck

Wg