2008 codebook change 210.4 d

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apprenticemike

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GROUPING. The ungrounded and grounded conductors of each multiwire branch circuit shall be grouped together by wire ties or similair means in at least one location within the panelboard or other point of origination.

Exeption: The requirements for grouping shall not apply if the circuit enters from a cable or raceway unique to the circuit that makes the grouping obvious..



i am having a discussion with my general foreman on what this means.. my interpretation of this tells me that if a multiwire branch circuit is pulled in to the panelboard through the same conduit as other circuits, we are to create a separation from the rest of the circuits with wire ties or any other suitable means from the rest of the conductors.
can you guys please help me interpret this article as best possible??? thanx ps.. keep in mind this is a new article added to the 2008 codebook
 
apprenticemike said:
my interpretation of this tells me that if a multiwire branch circuit is pulled in to the panelboard through the same conduit as other circuits, we are to create a separation from the rest of the circuits with wire ties or any other suitable means from the rest of the conductors.
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Yes, that's exactly what it means. If the MWBC were contained in a cable grouping is not required. If a MWBC is contained in a raceway by itself grouping is also not required.

Welcome to the Forum.
 
apprenticemike said:
...
i am having a discussion with my general foreman on what this means.. my interpretation of this tells me that if a multiwire branch circuit is pulled in to the panelboard through the same conduit as other circuits, we are to create a separation from the rest of the circuits with wire ties or any other suitable means from the rest of the conductors.
can you guys please help me interpret this article as best possible??? thanx ps.. keep in mind this is a new article added to the 2008 codebook
Click to expand...
The intent is not to require separation, but only to require a means to identify what grounded conductor is used with what ungrounded conductors. You only need to group them at one point.
 
I am still 2005 code where I am at, and have started doing this plus I usually will do it in junction boxes or other accesses where conductors are spliced or connected. I hate going into an older installation and have a situation of having to open a neutral and have to try to figure out if other breakers need to be turned off. Of course the new rule of multipole breakers or handle ties in all occupancies helps with this situation also, but like I said I still have to use 2005 NEC.
 
iwire said:
That new rule is foolish and will cause more hot work than it prevents.
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Ditto that. I wish that they had included using wire marker numbers on each conductor in lieu of the grouping requirement. :roll:
 
hey guys thanx a lot for the help.. im 23 and only been in the trade for a year and a half.. so i think i'll be spending some more time here and learning from some of the vets
 
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