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Category: Electrical
Satisfied Customers: 2412
Experience:  29 years as a Licensed Electrical Contractor in Illinois, 5 year college Electrical Instructor, Former Electrical Inspector, Diploma in Digital Electronics, Former Illinois Licensed Home Inspector
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What size wire 200 amp 3 phase feeder?

Resolved Question:

What size wire do you need for a 200 amp 3 phase feeder?

Submitted: 2 years ago.
Category: Electrical
Expert:  Kevin replied 2 years ago.

Hello. I will be happy to assist you with your electrical question.

What is the 3-phase voltage and approximate distance?

Customer: replied 2 years ago.

480vac 400 ft

Expert:  Kevin replied 2 years ago.

1) Calculating the voltage drop using a 200 amp load with 480VAC 3-Phase @ a 400 foot run results in 2/0 Copper with a 2.7% voltage drop or 13 volts

2) Calculating the voltage drop using a 200 amp load with 480VAC 3-Phase @ 400 foot run results in 4/0 Aluminum with a 2.5% voltage drop or 11.8 volts

3) Due to the distance, the use of 4/0 Aluminum will be more cost efficient than using copper conductors.

Hope this helps.........If you have any additional questions, let me know and I'll be glad to answer them for you.

Otherwise, don't forget to rate me before you log Off.

The next time you have an electrical question, you can also request for me at: http://www.justanswer.com/home-improvement/expert-your-electrician
..........Thanks..............Kevin!

Customer: replied 2 years ago.

so would I need a 3c 2/0 cabal or what do you recommend I want to use copper

Expert:  Kevin replied 2 years ago.

1) Nick..... 2/0 copper will work fine, but keep in mind that copper will cost more than aluminum does. I also prefer to use copper as much as I can. Was just trying to provide you with both options.

2) Either one will work as they are both under the recommended 3% maximum voltage drop.

Category: Electrical
Satisfied Customers: 2412
Experience: 29 years as a Licensed Electrical Contractor in Illinois, 5 year college Electrical Instructor, Former Electrical Inspector, Diploma in Digital Electronics, Former Illinois Licensed Home Inspector
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