Multiwire branch

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High Peak

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In a three phase panelboard, do you need a three phase breaker if you share a common neutral with all three phases?
 
Depends on the code cycle that you're under. 2008 the answer is yes or a handle tie.
 
Three basic questions in a row from the same person that looks like homework ? Where are these questions coming from at of the blue?
 
If in a shared pipeline with other circuts, multiwire branch circuts need to be grouped (tie wrapped with nuetral)when they enter panel
 
flatlander1982 said:
If in a shared pipeline with other circuits, multiwire branch circuits need to be grouped (tie wrapped with neutral)when they enter panel
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That's only if they're from a conduit with other circuits. A single MWBC in a raceway or MWBC that is contained in a cable does not require grouping.
 
infinity said:
Depends on the code cycle that you're under. 2008 the answer is yes or a handle tie.
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Do they make a handle tie approved for 3 breakers? I've heard that there isn't any approved for that just yet. One of the manufacturers is suppose to have an approved one sometime in 2009.
 
William1978 said:
Do they make a handle tie approved for 3 breakers? I've heard that there isn't any approved for that just yet. One of the manufacturers is suppose to have an approved one sometime in 2009.
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SQ D does, I'm not sure about others.

Roger
 
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