Stevenfyeager
Senior Member
- Location
- United States, Indiana
- Occupation
- electrical contractor
How do I parallel a 400 amp s. phase service to two 200 amp panels 250 feet away
steve
- Thread starter Stevenfyeager
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Cow
Senior Member
- Location
- Eastern Oregon
- Occupation
- Electrician
Commercial? Residential?
Are they service conductors or a feeder? Inside a building or outdoors? Etc Etc.
If you want a real answer you have to post ALL the details.
Are they service conductors or a feeder? Inside a building or outdoors? Etc Etc.
If you want a real answer you have to post ALL the details.
petersonra
Senior Member
- Location
- Northern illinois
- Occupation
- Semi-retired engineer
lamp cord. it has to be at least 18 gauge though. 
first question is are they really in parallel? or are they two taps?
first question is are they really in parallel? or are they two taps?
John120/240
Senior Member
- Location
- Olathe, Kansas
lamp cord. it has to be at least 18 gauge though.
first question is are they really in parallel? or are they two taps?
The 400 A meters that I am familiar with, Milbank, have a two barrel lug per phase. Size your XXHW for voltage drop, does XXHW come in 18 ga ?
- Location
- New Jersey
- Occupation
- Journeyman Electrician
Steve,
As you may gather from some of the responses we need more information to answer the question. And don't let some sarcasm dissuade you.
Welcome to the Forum.
qcroanoke
Sometimes I don't know if I'm the boxer or the bag
- Location
- Roanoke, VA.
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- Sorta retired........
Steve,
As you may gather from some of the responses we need more information to answer the question. And don't let some sarcasm dissuade you.
Welcome to the Forum.
Yeah, and we wonder why people post one time and after all the smartass replies they never post again......
Cow
Senior Member
- Location
- Eastern Oregon
- Occupation
- Electrician
I they can't handle the little bit of ribbing on here, there is no way they'd make it on a construction site.
MasterTheNEC
CEO and President of Electrical Code Academy, Inc.
- Location
- McKinney, Texas
- Occupation
- CEO
Steve,
Firstly, we will assume (I will anyway) that you are coming from a 400/320 Meter Enclosure to (2) separate 200A panels. This would not be a parallel application in its nature. But it does lead to other questions. Since you are new to the forum (I am new myself:roll
make sure the questions that you ask have as much detail as possible because it makes a difference in the responses.If your meter enclosure has double lugs then you can come out with a separate 4/0 AL and keep the calculated loads under the respective value given in 310.15(B)(16) or 3/0 CU if you choose.....and keep in mind any adjustments or corrections that may apply along the way.
Based on the brief description I would say ignore 310.15(B)(7)(1) as it does not seem to apply in your example. Can't also tell because you did not express if it was a 120/240V application or otherwise....again the devil is in the detail.
The more accurate the question the more accurate the responses....Welcome to the Forum !
Hameedulla-Ekhlas
Senior Member
- Location
- AFG
full info required.
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