310.15(b)(6)

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I have followed this post with great interest and have decided that post #47 clarifies the intent the best for me. 5-star post by all means. Thanks to all who participated. :smile:
 
now all you have to do is locate a 200 amp loadcenter that will accept 300 kcmil wire. :smile:
 
augie47 said:
now all you have to do is locate a 200 amp loadcenter that will accept 300 kcmil wire. :smile:
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Yes, if you can only get a couple of threads tightened on the conductor, it would be a violation of 110.14 in the sense that it would not be a thorough connection. If I remember correctly, I've seen fittings that crimp around the 300 kcmil and have a point/end that fits in a 4/0 terminal that are listed for the purpose. :)
 
wbalsam1 said:
I've seen fittings that crimp around the 300 kcmil and have a point/end that fits in a 4/0 terminal that are listed for the purpose. :)
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I have used those fitting over 30 years ago-- I am sure they are still available. Reality is most people don't have the crimps for them and won't buy them. I bet the lugs are going to get bigger.
 
augie47 said:
Now that the 'o8 Code has calrifierd the wording of 310.15(B)(6) is the following correct ?
I build a 200 amp serivce, based on the table, I have a 4/0 AL riser.
I feed an outside feed-thru disconnect with my 4/0 AL. I add a 15 amp 2 poe breaker at the outsidepanel and feed an HVAC condensor unit for the gas furnace. I then run a interior feeder to the interior panel for all the other house load. Since the feeder is no longer carrying "all loads associted with he dwelling", it will need to be a 300 kcmil (AL) Correct ?

a 2nd queston. If that outside panel has a 15 amp branch circuit feeding a detached garage (and no condensor) since that garage is "associted with the dwelling" is my house feeder still required to be a 300 kcmil (AL) ?
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Hi Gus, The initial feedthru main is your disconnect, isn't it? The riser would still remain 4/0 and the feed thru can still be 4/0 to the interior panel based on [310.15(B)(6)] quoting " feeder conductors to a dwelling unit shall not be required to have an allowable ampacity rating greater than their service-entrance conductors."

Qu 2 If the outside disconnect is a combo all in one, that seems acceptable. Maybe I have gotten lost here...Is the detached garage feeding the house? If that is the case, I believe the original statement still applies from [310.15(B)(6)]. Am I interpreting the post in the right direction? rbj
 
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