3 2000W in a 4x4x6?

[ed_denu]

Originally Posted by newchapter

couple of questions. Is 11100 enough on elements?A lot depends on the oven construction but you should get to temp within 20 min or so.
What size wire do I need coming from my elements? If you are referring to hi-temp wire like the 842 degree MG wire McMaster Carr sells then the 20 ga would be sufficient. Once outside the oven I would use a 12 ga stranded wire. You previously referenced different sized elements. To be certain you need to list their actual size.
Were is the best place to put my vent?(1" with elbow)I'm not sure it's the 'best' place, but I placed mine about 4" from the top of the oven in the side wall.
My elements are, against the wall facing up. I have one on the back wall and 1 on each side. Were is the best place to put a fan? Im getting this one for now. Motors > HVAC Motors > 3.3 Inch Diameter Motors > Motor,1/100 HP,3.3 In : Grainger Industrial Supply

See above comments

[FigureLLC]

our new 3.5x3.5x6 with 12kw hits 400 in 12min. That's also with 6" insulation, which I used to better handle ceramic coating temps.

[ed_denu]

Originally Posted by FigureLLC

our new 3.5x3.5x6 with 12kw hits 400 in 12min. That's also with 6" insulation, which I used to better handle ceramic coating temps.

Looks like the new oven is working well for you.

[newchapter]

Originally Posted by ed_denu

See above comments

Quote:
Originally Posted by newchapter
couple of questions. Is 11100 enough on elements?A lot depends on the oven construction but you should get to temp within 20 min or so. 4 inch mineral wool the bottom has 24 ga sheet metal and concrete underneath.
What size wire do I need coming from my elements? If you are referring to hi-temp wire like the 842 degree MG wire McMaster Carr sells then the 20 ga would be sufficient. Once outside the oven I would use a 12 ga stranded wire. I have 842 degree 12 ga MG electrical power wire that I thought I could use from the elements and 12 ga TGGT electrical power wire, 482 degree outside the oven. You previously referenced different sized elements. To be certain you need to list their actual size. I have a 3400, 3700, and 2 - 2000 watt elements
Were is the best place to put my vent?(1" with elbow)I'm not sure it's the 'best' place, but I placed mine about 4" from the top of the oven in the side wall.
My elements are, against the wall facing up. I have one on the back wall and 1 on each side. Were is the best place to put a fan? Im getting this one for now. Motors > HVAC Motors > 3.3 Inch Diameter Motors > Motor,1/100 HP,3.3 In : Grainger Industrial Supply Sorry for the confusion. Sometimes I'm not very clear. When I take a project like this I've never done before, confirmation helps me feel better about my decisions. I have a lot of time and money in this. I want to do it right. Man thanks a lot for helping me and others with this.

[CarWiz]

Your reference is not a fan. It's just the motor. Good up to 100 Degrees with class B insulation. It also needs air-over cooling. Not particularly suited for an oven but I guess it could be mounted remotely with an isolated shaft and fan. What may be easier is to get a high temperature blower designed to handle high heat. The motor is outside of the hot air path.

Enter "high temp blower" in Grainger's search field and you'll get the type needed. There's a 82cfm blower for just over $79 here:
HVACR > Blowers > Small Centrifugal Blowers > Blower,82 CFM,2300 : Grainger Industrial Supply

[newchapter]

good point. I have thought about this way too much. For now I may not even go with the small fan. You got 400+ degrees going in that motor, how long will it last? I plan to go that route, and when I do I would want to get a better fan than that one

Originally Posted by CarWiz

Your reference is not a fan. It's just the motor. Good up to 100 Degrees with class B insulation. It also needs air-over cooling. Not particularly suited for an oven but I guess it could be mounted remotely with an isolated shaft and fan. What may be easier is to get a high temperature blower designed to handle high heat. The motor is outside of the hot air path.

Enter "high temp blower" in Grainger's search field and you'll get the type needed. There's a 82cfm blower for just over $79 here:
HVACR > Blowers > Small Centrifugal Blowers > Blower,82 CFM,2300 : Grainger Industrial Supply

[ed_denu]

Originally Posted by newchapter

Quote:

What size wire do I need coming from my elements? If you are referring to hi-temp wire like the 842 degree MG wire McMaster Carr sells then the 20 ga would be sufficient. Once outside the oven I would use a 12 ga stranded wire. I have 842 degree 12 ga MG electrical power wire that I thought I could use from the elements and 12 ga TGGT electrical power wire, 482 degree outside the oven. You previously referenced different sized elements. To be certain you need to list their actual size. I have a 3400, 3700, and 2 - 2000 watt elements

The 12 ga is fine.

[donafams]

Originally Posted by newchapter

Im another new guy so please bare my ignorance I need some help really bad. I have a 100 amp breaker box in my shop. .

i think you should lower that beaker to about 35amps, if not and your system shorts or something and your wires overheat your 100 amp breaker may not trip.

[ed_denu]

Originally Posted by donafams

i think you should lower that beaker to about 35amps, if not and your system shorts or something and your wires overheat your 100 amp breaker may not trip.

I think he is referring to his service panel, not the circuit he intends to use for the oven. He is using 11100 watts or 46 amps for the elements, so something closer to a 60 amp circuit would be required. But I do agree that a 100 amp circuit would be inappropriate for this sized oven.

[FigureLLC]

Originally Posted by ed_denu

Looks like the new oven is working well for you.

i'm very happy with it! thanks HUGELY to you! thanks ed! i took a bunch of pics of the build process, and i'll get those up in another thread at some point.