wire feed size for dble oven setup ? ? ?

yes.itsconcrete

had to remove kitchen's stack'd ovens & found #12 ( bld, red, white, bare gnd )from jct box to appliance,,, found line feed from box is alum so will replace w/copper sheath'd - what size wire ? ? ? existing # 12 to jct box OR increase to # 10 ? ? ? code determines which,,, figure 30' from panel to jct box - THANKS, GUYS ! ! ! appreciate the help.

joed

#12 is good for 20 amps, #10 good for 30 amps. What size breaker does the manual for the ovens say it requires?

yes.itsconcrete

twin 20s stack'd together w/common throw bar printed ' 40a ',,, who knows where the ovens' manuals are ? ? ?

Stubbie

Are you replacing or just reinstalling the existing ovens? Are you talking about a quadbreaker that has 2 twenty amps and a handle tied 40?

yes.itsconcrete

just reinstalling existing, stub,,, ' quadbreaker ' - izzat what they're called ? ? ? YUP, 2 twenty amps and a handle tied 40,,, you been down in my basement ? ? ?

Stubbie

Ok if I'm understanding correctly you have an aluminum branch circuit from the panel to the oven jb then a appliance whip(s) to the ovens. The appliance whip(s) have a black, red, white, and bare. I doubt the 20 amp breakers serve the ovens only the handle tied 40. For a 40 amp branch circuit the cable should be #8 awg copper. If the whip(s) are factory and I would think they would be just connect them in the jb with the #8 cable wires.

It would be nice to know the nameplate information as to the amperage voltage requirements of these double ovens....

daxinarian

if I am understanding your post right, there is two 20 amp breakers tied together. If thats the case, #12 copper wire is appropriate. Even though its a "40 amp" breaker, each hot conductor has a 20 amp breaker protecting it (20 amp = #12). If its really two 20 amp breakers tied together, thats a 20amp double pole breaker (20 amps of 220/240V)

yes.itsconcrete

we have a gas cooktop so that's it for this circuit, stub,,, yes, alum from panel box to jct box,,, copper # 10 whip wires from jct box to wire studs on ovens,,, how much more can it be to up to #8 ??? labor's the same effort whether i'm pulling 8 or 10, right ??? here's a kicker - bare copper gnd wire was nutted onto the main feed gnd,,, think that's ok, tho, as it went back to the panel box which is tied into copper ground rod stake outside.

appreciate your advice & time, stub.

yes.itsconcrete

have gas cooktop so that's it for this circuit, stub,,, yes, alum from panel box to jct box,,, copper # 10 whip wires from jct box to wire studs on ovens,,, how much more can it be to up to #8 ??? labor's the same effort whether i'm pulling 8 or 10, right ??? here's a kicker - bare copper gnd wire was nutted onto the main feed gnd,,, think that's ok, tho, as it went back to the panel box which is tied into copper ground rod stake outside.

tag's gone from ovens OR hidden by cover which i'm too (*^#@%^ tired to take off & look at right now

appreciate your advice & time, stub/dax/joed

Stubbie

I'm somewhat confused... the appliance wires that are #10's are black, white red and bare...is that correct?

What are you calling the main feed ground?

Is the aluminum supply cable from the panel 2 hots and a bare or 2 hots, a white wire and a bare wire?

In most double ovens the supply is only 240 volts and most generally a 40 amp branch circuit.

I'm trying to determine what your ovens require... 240 volts only.. or 120/240 using a neutral wire.


You also stated you currently have #10 wires in the whip to the ovens, what size wire is the aluminum from the panel to the oven jb?

yes.itsconcrete

so's i confused & wish i spoke better electrical,,, anyway, just bought 35' of sheathed # 8 for box-jct box run,,, we'll nut to the whip's 10s.

' main feed ground ' is the ground line hooked onto the panel box to which stud(s) all other grounds should be attached.

i got 1 copper hot coming off each breaker,,, found another jct box 1/2 where the copper's nutt'd onto aluminum,,, cheap bastard

now that this is changed out, better ck behind some other receptacle covers.

frenchelectrican

The term of sheathed wire useally called NM { NonMetalic } AKA Romex which it normally have black , red, white and bare { XX-3 W/G } { XX - the wire size useally in AWG like 12 or 10 or 8 or other size }

The nameplate info on the double wall oven useally either near upper or lower door it will have tag somewhere { useally can't miss that } it will tell the KW and voltage on it some case amparage as well.

Most double wall ovens useally run either 30 or 40 amp depending on the manufacter set up { that why you need to double check with the info tag on it.

Merci,Marc

220/221

Double oven = 8/3 NM on a 40 amp breaker.

I repaired a single oven burned wirenut connection yesterday and the factory whip had #14's running to it

chris75

True, but the factory wire they use has much higher insulation value then what we use.

frenchelectrican

Belive or not but true the factory wiring is much higher than standard building wire and one wire I did see one marked 150°C and other one IIRC I think it was about 220°C { either 210 or 250°C } so they can take a bit of heat there.

Merci,Marc