Big oven

[monarohq]

my plan is to build a 10'x10'x8; oven, I have three phase so I would like to know how many elements should I run and what wattage each should be.
I know its a big oven but thats what I want,A will make a smaller one as well later.
Any help would be great!

[FigureLLC]

130,000W give er take should do it! this based on the 160W/cubic foot in mine.

[ed_denu]

An oven this size cannot be heated with electric imo. Even if you went with only 100 watts a cf, it would require 333 amps to heat. That's impossible to achieve in all but the largest of industrial areas.

There are some true 3 phase heating elements available, but they are extremely pricey. If you used 240 watt single phase elements you would need (16) 5K watt elements just to get 80k watts. If your 3 phase is Y service then you will only see 208 volts and your wattage would be less. Sorry monarohq but building an oven this size isn't practical nor a diy project.

[ed_denu]

You didn't state if your 3 phase is:

120/208
120/240
277/480

It makes a difference if you are attempting to use these in single phase type elements.

[monarohq]

My 3 phase service is 4 wire Blue,red,black and white 240/440v at 120amps each phase?
I am in Australia so its a bit different but not that much.
Measured between two phases is 440v,measured between 1 phase and neutral is 240v.
Hope this helps!
Cheers guys...

[ed_denu]

Do oven elements in Australia typically use 240 volt single phase power? Are there single phase elements available rated at 440 volts which could be run phase to phase? You may need to speak to an electrician familiar with your in-country voltages to get an definite answer.

But even if you had 300 amps total power available that would still only get you to 72,000 watts with single phase power.

One problem regardless of the capacities of your service panel will be sizing the wire to handle the element load. If you use high temperature MG type wire throughout, the 10 gauge can go up to 100 amps. It would take some planning to come up with a schematic to handle these loads.