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Thread: multiple current carrying conductors in a single racway (loading the boat)

  1. #11
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    Not to get off topic, but...

    What is this reference to "Full Boat"? A Conduit filled to capacity?

  2. #12
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    Quote Originally Posted by EverydayElectrician View Post
    Not to get off topic, but...

    What is this reference to "Full Boat"? A Conduit filled to capacity?
    Three hots and a neutral.
    If you don't think too good, don't think too much.

  3. #13
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    Quote Originally Posted by EverydayElectrician View Post
    Not to get off topic, but...

    What is this reference to "Full Boat"? A Conduit filled to capacity?
    Full boat or around here it's called a full set, however for us the use of MWBC's is waning with the common disconnect rule.
    Rob

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    All responses based on the 2014 NEC unless otherwise noted

  4. #14
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    Quote Originally Posted by infinity View Post
    Full boat or around here it's called a full set, however for us the use of MWBC's is waning with the common disconnect rule.

    amen...

  5. #15
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    Quote Originally Posted by jumper View Post
    If you are sharing nuetrals then you could get nine 20A circuits in a 3/4” EMT, derate and still use #12. I usually use stranded or use 1” EMT.

    9 hots, 3 neutrals, and 1 EGC. Code wise you can use the EMT as an EGC.
    Where do you get 3 neutrals for a MWBC? 1 per 3 ckts?

  6. #16
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    Quote Originally Posted by infinity View Post
    Full boat or around here it's called a full set, however for us the use of MWBC's is waning with the common disconnect rule.
    So you guys are running MWBC and using multi pole brkrs or handle ties? Even is spec calls for no shared neutrals?

  7. #17
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    Quote Originally Posted by mstrlucky74 View Post
    So you guys are running MWBC and using multi pole brkrs or handle ties? Even is spec calls for no shared neutrals?
    Depends, if the developer doesn't specify and wants the cheapest installation possible a bunch of handle ties are much cheaper than separate neutrals.
    Rob

    Moderator

    All responses based on the 2014 NEC unless otherwise noted

  8. #18
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    Quote Originally Posted by mstrlucky74 View Post
    Wheredo you get 3 neutrals for a MWBC? 1 per 3 ckts?


    Yes. One neutral per A, B & C phase

    Quote Originally Posted by infinity View Post
    Depends,if the developer doesn't specify and wants the cheapest installation possible abunch of handle ties are much cheaper than separate neutrals.


    I still haven’t heard if guys are doing takeoff like this. Iknow you CAN figure it like this, but do you?


    Still looking for other tricks and methods to drive anestimate down…

  9. #19
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    I believe they make 3 pole handle ties.... 3- sp breakers and then the ties if you are worried about cost
    They say I shot a man named Gray and took his wife to Italy
    She inherited a million bucks and when she died it came to me
    I can't help it if I'm lucky



  10. #20
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    How large are these jobs your estimating? I always assume 7#12's for my branch (where applicable) & i do this almost as you pictured, depending on how far they are apart. Doing calculations for this in my opinion is a waste of time; unless these are a good distance away from you BPB. Just my 2 cents.

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