I am replacing my wife's wall oven with the same size oven. (24 inch). The old   
   oven has been there for at least 12 years.   
      
   The directions with the new oven say to put the oven on 2x4 runners. My old   
   oven did not have these. That is no problem. I wonder though if metal studs   
   would be better to use as runners becasue they are non combustable?   
      
   Anyway, the question I have concerns the junction box. My current box is   
   located on the surface of the drywall directly on the back wall off the   
   opening and toward the bottom. The directions say, "locate an approved   
   junction box, in the suggested    
   location, a minimum of 23 7/8 above the runners".   
      
   My current juntion box is not 23 7/8 above the runners.    
      
   My question is this: 1. Why is this a requirement? Does it have to do with   
   heat from the oven or something else?   
      
   2. Does this box really need to be moved, and if so what is the best way to do   
   it?   
      
   What I dont understand it has on the drawing two pictures of acceptable   
   locations for the box. One is up high 23 7/7 above the runners. However, one   
   picture with no inch markings on it shows a junction box level or below the   
   runners? (It kind of    
   contradicts the obove statement of locating this box "above" the runners.   
      
   As always I appreciate the help.   
      
   p.s. concernign my previous electrical switch question, I decided to put the   
   switches back the way they were and to add another outlet properly, by teeing   
   off an existing outlet in the bathroom.   
      
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