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ffauth 08-23-2010 07:14 PM

Cooktop and Stand Alone Oven Wiring Replacing Existing Single Range/Stove Combination

I am in the process of remodeling my kitchen.

The current kitchen has the typical oven/stove combination powered by a 3-prong plug on the floor. It is connected to #6 Aluminum wire (2-wire, Black, White and Bare). It is governed by a 50-AMP 220V breaker. I have no free slots in the breaker box. I do have full access to the wiring as the basement is unfinished.

We are upgrading the kitchen to a new cooktop and wall over (neither have been purchased yet), and I'm looking for general guidelines on how to change the wiring in the kitchen to accommodate the new setup.

My primary concern is "doing it right" - I don't want to cut corners.

Question 1: Do I need to re-run a new cable from the main panel? I have read on other forums that most new cooktops/ovens run 220V and 110V together and require 4-wire. I am concerned about splicing AL/CU together and have heard I should avoid this, hence why I am thinking that a new wire will need to be run.

Question 2: Do I need to run two independent circuits, or is it OK to run one wire to a junction box and then split off to the cooktop and oven? It would be advantageous for me to do this since the breaker panel is not close to the kitchen.

Question 3: Right now, I have #6 Aluminum wire and a 50 amp breaker. What method should I use to size the breaker/wire required for the oven and cooktop together if this is allowed?

I have a good understanding of basic wiring principles and have done a good bit of 110v wiring in my home. This is only my second foray into 220v and the first time I have worked on existing 220v wiring.

Thanks for the help!

Scuba_Dave 08-23-2010 07:42 PM

Where are you located ?

ffauth 08-23-2010 07:49 PM


Originally Posted by Scuba_Dave (Post 490179)
Where are you located ?

Hi Scuba_Dave,

I'm in Maryland and I've updated my profile.

I believe we are governed by the NEC 2005.


Scuba_Dave 08-23-2010 09:03 PM

I would run a new 4 wire feed for the stove to bring it up to date
In most cases seperate cooktop/oven can be fed by the same circuit
...split off as needed to each
Exception might be on a high end system that pulls a lot of power

Sizing would depend upon power draw & Mfg requirements
Most are a 50a setup & can use #8 copper
I had some other runs to make & used #6 wire
....less $$, easier to buy a roll of #6 for what I was doing

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