Ranges

[tbooth]

I find that most ovens/ranges are connected with two ungrounded conductors and ground.
But most have a clock or timer or digital temp display which to me indicates nuetral load. The cord supplied only has 3 conductors. This does not seem right.
Is this addressed in the code?

 

[augie47]

Certainly is. 250.142

 

[mikeames]

Keep in mind manufactures may also design these digital displays with a 240v power supply. Thus not needing a neutral. From an engineering standpoint this would make sence and add no aditional cost to production.

 

[Sierrasparky]

Keep in mind manufactures may also design these digital displays with a 240v power supply. Thus not needing a neutral. From an engineering standpoint this would make sence and add no aditional cost to production.

Most of those ovens you speak of use a nuetral as a grounding conductor not the uninsulated ground as a grounded conductor. I was understood that if the oven branch circuit originated at the service panel then the Nuetral could serve as the grounding conductor as I remember.

what the mistake was that this was done at a sub panel. Branch circuits were never intended to be wired this way. Then the issue of the uninsulated wire as a nuetral I don't think was ever permissable.

When I change out a Range I alway's add the proper cord and receptacle as per code. Especially if it was never permissable at the time of contruction.

 

[LarryFine]

Then the issue of the uninsulated wire as a nuetral I don't think was ever permissable.

It was if the bare was of an SE cable, but not of NM.

 

[Sierrasparky]

It was if the bare was of an SE cable, but not of NM.

Oh yea forgot that one. Never used it in that manner and rarely see it used around here.