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BUCKEYE PERFORMANCE INC.

BUCKEYE PERFORMANCE INC.
Joined
Dec 3, 2006
Location
swannanoa
Thought I'd ask here since we have plenty of smart people.
I have a powder oven with 3=3000 watt 220v elements we are building and I need to know what size breaker I should put in the box?
I think the draw should be about 40a but that's why I'm asking.

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Amps = watts/Volts


So, do the math and add some for distance and comfort.

You will need to make sure your plug and outlet are appropriately sized for the breaker and that you don't exceed the allowable draw for your service.
 
Amps = watts/Volts


So, do the math and add some for distance and comfort.

You will need to make sure your plug and outlet are appropriately sized for the breaker and that you don't exceed the allowable draw for your service.
So basically put it on a 60a in the shop box and a 50a in the unit on the oven.

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Yea what he said and make sure the wire you run is more than adequate.


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Wait are you home building this or is it a pre-made thing? If so the mfr will tell you what size breaker.
But yes - all 3 at once is 9kW, @220V that's 40.9 Amps, so 50 is about right. So be sure you're running at least 6 ga wire
 
Wait are you home building this or is it a pre-made thing? If so the mfr will tell you what size breaker.
But yes - all 3 at once is 9kW, @220V that's 40.9 Amps, so 50 is about right. So be sure you're running at least 6 ga wire
This right here is your answer.
 
Metric or English volts? Need to know whether to buy clockwise or counterclockwise twisted wire strands.

Just kidding :p

RatLabGuy is correct, (3000*3)/220=40.9 amps. 50 amp breaker should be good. Bigger wire will give you less voltage drop. Here's a nice calculator for sizing it: Wire Size Calculator
 
Thanks guys this is what I wanted to know.
This oven is something I am building in house to do bumpers , suspension parts, axle housings and anything else that will fit. It has 3 elements and a fan to keep the temps even.
it is controlled with a PID and thermocouple to operate 3 solid state relays.

BUCKEYE PERFORMANCE INC.
828-779-2242
 
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Still gotta add a timer system ,wire the fan , install door seals and latches so this thing can start paying for itself.

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@BUCKEYE PERFORMANCE INC. how long before you think you'll be baking?
It heats 50 deg to 400 deg in 28 minutes and then holds temp for 20 min without turning back on. I goofed and ordered the wrong PID so the temperature reads in Celsius. 204 is 400 deg. All the wiring stays cool so I think we are good to go
9c246ede9653ef87d325171af9449556.jpg
e08d44fb595b1c6e08074713bc7cc2c2.jpg


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It heats 50 deg to 400 deg in 28 minutes and then holds temp for 20 min without turning back on. I goofed and ordered the wrong PID so the temperature reads in Celsius. 204 is 400 deg. All the wiring stays cool so I think we are good to go
9c246ede9653ef87d325171af9449556.jpg
e08d44fb595b1c6e08074713bc7cc2c2.jpg


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Ah, Celcius... you'll just have to read temp like scientists and the whole rest of the world
 
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