How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Kevin Your Own Question
Kevin, Licensed Electrician
Category: Electrical
Satisfied Customers: 2823
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
Type Your Electrical Question Here...
Kevin is online now
A new question is answered every 9 seconds

What Size Wire To Use For A 200 Amp 3 Phase Feeder?

This answer was rated:

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

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

What is the 3-phase voltage and approximate distance?

Customer: replied 3 years ago.

480vac 400 ft

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.

Customer: replied 3 years ago.

So would I need a 3c 2/0 cabal or what do you recommend?

I want to use copper.

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.

Kevin and other Electrical Specialists are ready to help you

Related Electrical Questions