multiwire branch circuit.

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slick 50

slick 50

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I had an inspector say that because we had 6 circuits feeding office cubicals, he wants a 6 pole handle tie simultaneously disconnecting all six ungrounded conductors even know that it is actually 2 seperate 3 wire homeruns. I believe that there is no need for that. All that is required is to disconnect the three ungrounded conductors simultaneously that is sharing that particular neutral in that raceway by using a three pole breaker or a three pole handle tie. Have any of you ever came across something like this. I appreciate any input.... THANKS
 
For office partitions you need to look in Article 605.

Take a look at 605.7 for freestanding type partitions and 605.6 for fixed type partitions.

Chris
 
raider - you da' man

raider - you da' man

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The language of 2008 NEC 605.6 & .7, with respect to "Multiwire branch circuits supplying power to -------(read fixed or freestanding-Al)-----shall be provided with a means to disconnect simultaneously all ungrounded conductors at the panelboard where the branch circuit originates," seems confusing until one pays attention to the word "circuit."

"Circuit" is singular.

To require the simultaneous disconnect of multiple branch circuits with a single means, the word "circuit" would be singular and plural, that is, "circuit(s)".

The 2008 NEC Handbook adds explanatory text for both 605.6 & .7 stating more clearly that each multiwire branch circuit and/or branch circuit needs its own disconnecting means by raising the example of a regular branch circuit and a branch circuit originating from an uninterruptable source or of a different voltage.
 
does anyone make a six pole handle tie. Would a three pole handle tie be listed to wiork across 2 three pole breakers. Ex. 2 poles on 1 breakr and 1 pole on the other.
 
I agree with Al,

You don't need a 6 pole handle tie just 2 3 pole handle ties. Each multiwire branch circuit would need a common handle tie, not one handle tie for both multiwire branch circuits.

Chris
 
If you have six ungrounded conductors sharing one neutral, you do not have a MWBC, by definition of that term. This also means that you have a code violation. So there is no need to be discussing a six handle tie.
 
charlie b said:
If you have six ungrounded conductors sharing one neutral, you do not have a MWBC, by definition of that term. This also means that you have a code violation. So there is no need to be discussing a six handle tie.
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I agree!!!!!!!!!!!!!!!
 
I believe that charlieb was saying that 6 ccc's sharing one neutral would be a violation, not that you had that condition. therefore the correct answer would be handle 2 ties.
 
slick 50 said:
Who said that there is 6 ungrounded conductors sharing 1 neutral. please reread.
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My comment was directed against the inspector who said you had to handle tie 6 poles. As the others have said, my point was that the inspector was wrong, in that you cannot have more than 3 ungrounded conductors in a MWBC, without creating an NEC violation.
 
Charlie b, I understand where you were comimg from. We all know that you cannot have more than 3 hots in the MWBC, even the inspector; but the inspector was wanting all circuits disconnected at one time just because they are internal to the furniture. basically he wants every thing deenergized before you attempt to work on any part of the furnitures electrical components. THANKS ALL! we can move on to bigger fish to fry now...
 
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