Chapter 2: Wiring and Protection, National Electrical Code of Utah | UpCodes

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3 phase feeder circuit free.Feeder Calculation 

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3 phase feeder circuit free. Voltage Drop Calculator

 

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Electrical Feeder Calculation - Construction Monkey.Feeder or Service Neutral Load | UpCodes

 

Forums New posts Search forums. What's new New posts. Log in Register. Search titles only. Search Advanced search…. New posts. Search forums. Log in. For a better experience, please enable JavaScript in your browser before proceeding. You are using an out of date browser. It may not display this or other websites correctly. You should upgrade or use an alternative browser. Thread starter Tajon Start date Feb 21, Status Not open for further replies. Tajon Member.

Location Los Angeles Occupation Electrician. Is there a special calculation for 3 phase feeders? Am I missing something? I used the 75 degree column from Any help is greatly appreciated! Location NE 9. What is your load calculation?

The feeder and protection is not required to be as big as the panel rating. We recently installed a amp feeder to a amp panel with full knowledge and acceptance by the owner. It was for specific loads and he was informed that. Three months later he is rethinking the cost savings. Such is life. Keep the feeders in separate conduits.

The Neutral and EG are not current carrying. Tajon said:. Click to expand Carultch Senior Member. Location Massachusetts. Where are you getting these wire sizes from, an engineer?

Why are adjustment factors being applied? I'm nervous about purchasing the wrong wire. There is 7 panels in total and this is my first time running feeders in parallel. The wire is going to be super expensive and I can not afford to order and install the wrong size wire.

I overthink things when it comes to thousands of dollars being spent. I also get lost in the code book looking for every single possibility that may apply to my design. Thanks for reading my post guys.

Note in Under normal conditions: For a amp panel, kcmil Cu is fine. For your amp with parallel conduits kcmil Cu would be fine. Do you mean all conductors in one raceway or each set in it's own raceway? Also unless you're doing a data center or some other specific installation where there are a large amount of harmonics the neutral does not count as a CCC.

Also the adjustment factor table is for CCC's in the raceway not the number of conductors. Carultch said:. Is there any standard for what "large amount of harmonics" means in this context? As in, what measurable factor would I look for in the waveform when I see it on an oscilloscope? The neutral counts in conduit fill but not as a CCC. LarryFine said:. Thank you. I think I get it. Not necessarily. If there is a good chance that the neutral will carry as much current as any one of the CCC's, then it would need to be as large as the CCC's.

Otherwise, it needs to be sized for the calculated current it carries, and no smaller than the EGC, if it carries a lot less current. Location Northern illinois Occupation engineer.