wire and breaker size

[rcollins]

The plate on my oven shows kw =14 for 120/240 and 10.8 for 120/208.

What size breaker and wire should I use for the circuit?

Thanks in advance for your help people.

[CarWiz]

Watts
------ = Amperes
Volts

14kw (14,000) / 240 = 58.333A

Your circuit should have a 70A rating. The wire size will depend on the length of the run from the supply box. You could use #10 wire for short runs but anything over about 30', I'd go with #8 wire. (Larger depending on length.) As the length increases, the voltage will drop and the amps will rise. You should have no more than 3% drop in voltage in the circuit to meet standards. Larger wire (#8 ) will lower voltage drop. But like I mentioned, it depends on the run. More info is needed to make a wire suggestion.

[CarWiz]

Added afterthought:
It looks like you may fall into a different category of electrical needs. (Commercial) You may have to run all your wire through conduit and that changes the specs. The second set of numbers (10.8 for 120/208 ) is for 3-phase power. You'll need to be more specific about your setup.

[ed_denu]

I think this is bad advice. While a lot of wire size calculators will give the type of numbers suggested, you need to look at the NEC to determine what is allowable.

10ga wire in a residential application cannot exceed 30 amps. A 70 amp breaker for an oven is looking at 4 ga. I believe commercial wire gauges are the same, but may require conduit as noted above.

[rcollins]

The oven is a household double oven, oven and range on the bottom and a smaller oven were the Microwave would be. Nothing industrial about it. I am going to use it in my garage and want to add a sub panel in the garage to feed the oven and my 5 horse compressor.

[ed_denu]

Randy, If you need to add a subpanel, then I would just get your electrician to look at the oven when you have the garage subpanel put in. A 70 amp feed would normally be hard wired, not something you would plug into a receptacle.

[PhredAre]

If this were my project, I would try to determine the size of the Elements(wattage) that are used and wire accordingly. I'm not familiar with this type of oven, but 14,000 watts seems a little much for a oven of this size. Fred

[CarWiz]

Originally Posted by ed_denu

I think this is bad advice.

Ops. You're right about that. Don't know what I was thinking.

I think you're right too Fred. The label is probably maximum draw with all burners going. The oven itself should be much less.

[rcollins]

Here is a picture of the oven. I am going to run a 100 amp sub panel in the garage and use a 60 amp breaker with 6 ga wire for the oven.