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08252011, 10:17 AM  #1 
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200 amps..how many watts?
I was looking at renting a warehouse for a business and was told the warehouse is wired for "200 amps of three phase power". I have no idea what that means. Basically I just want to know how many watts I can use with a 200 amp panel. I would like to have at least 50006000 watts available minimum in case we get some extra equipment. So 200 amps equals how many usable watts?
Thanks 
08252011, 10:23 AM  #2 
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200 amps..how many watts?
What is the voltage?
Total watts for 3 phase is = Volts x Amps x 1.732 
08252011, 10:37 AM  #3 
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200 amps..how many watts?
I have no idea. All I know is it's a 1000 sq ft warehouse with a 200 amp breaker.
Sorry :/ 
08252011, 10:45 AM  #4 
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200 amps..how many watts?
It is probably a 208/120 Y, multiply using 208.
It could be a 240/120 D, multiply by 240. If it is one of these, you need to be careful. It has a high leg. There are higher voltages, but the space is so small, I doubt you have them. 
08252011, 10:46 AM  #5 
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200 amps..how many watts?
You are in the USA, right?

08252011, 11:00 AM  #6  
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200 amps..how many watts?Quote:


08252011, 11:10 AM  #7 
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200 amps..how many watts?
Woah thats a lot of electricity!
I was just looking online at how much power these machines are gonna use, but if I'm working with those kind of numbers I should be fine.. 48000 watts?? Jeez Thanks for the replies 
08252011, 11:13 AM  #8  
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200 amps..how many watts?Quote:
Voltage, Nominal. A nominal value assigned to a circuit or system for the purpose of conveniently designating its voltage class (e.g., 120/240 volts, 480Y/277 volts, 600 volts). The actual voltage at which a circuit operates can vary from the nominal within a range that permits satisfactory operation of equipment. Voltages. Unless other voltages are specified, for purposes of calculating branchcircuit and feeder loads, nominal system voltages of 120, 120/240, 208Y/120, 240, 347, 480Y/277, 480, 600Y/347, and 600 volts shall be used 

08252011, 12:44 PM  #9  
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200 amps..how many watts?Quote:
But with warehouse the basic load you will deal is luminaire plus office space if you have them they don't really load it very much at all proply few KW the most. If you have to bring in the equiment if they do requred three phase connection the best idea is have a electrician come in and assist you on this due some case may run into non standard breaker or other items. Very few warehouse building I have ran into they will prove 480Y277 they will have much higer wattage load at 200 amp load you will have much as 160,000 watts. But there is a nice gotcha with all warehouse I know few case they will adveristing have " 200 amp avable " not always the case sometime you will get 100 amp instead so when you see that place and feel any doubt just get a electrician come in and help you with this so save some of the extra headaches. Merci, Marc
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The answer will be based on NEC ( National Electrical code ) or CEC ( Cananda Electrical code ) or ECF ( Electrique Code France ) 

08252011, 07:47 PM  #10 
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200 amps..how many watts?
Thanks to everyone for the informative replies! This is one of the best forums I've ever gone to for help. Quick and friendly advice from people who know their stuff!
Many Thanks! 
08252011, 08:06 PM  #11 
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200 amps..how many watts?
And the voltage is?

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