2008 NEC conflict

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grantcool

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Two new revisions causing conflict.
Does 210.12 (b) eliminate the installs of multiwire branch circuits because of 210.4 (b)?
Do they make handle ties to fit on AFCI breakers? If not, then no more multi's, right?
 
How would you wire 2 single pole AFCI breakers to a multwire circuit?

John, I have not seen any 2-pole Combination AFCI breakers. CH was making 2-pole units in the older style.
 
grantcool said:
Two new revisions causing conflict.
Does 210.12 (b) eliminate the installs of multiwire branch circuits because of 210.4 (b)?
Do they make handle ties to fit on AFCI breakers? If not, then no more multi's, right?
Click to expand...

Single pole AFCI breakers don't function on multiwire branch circuits due to the neutral only carrying the imbalanced load between the two ungrounded conductors.

As already pointed out currently there are no listed 2 pole combination type arc fault breakers available.

Chris
 
raider1 said:
As already pointed out currently there are no listed 2 pole combination type arc fault breakers available.

Chris
Click to expand...

There will be.

One of the arguments about AFCI's is that the manufacturers got this put in the code to make more money. Why would you think they would put something in the code if they did not have a product that would meet the requirement?
 
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raider1 said:
I have no doubt about that, they just don't currently have one.:)

Chris
Click to expand...


2pole144x144.jpg

Seimens 2-pole combo AFCI is hitting the market.
 
I don't believe all of the breaker manufacturers are making combo arc faults. They probably want to see what the demand will be for them. Heck, I would never do an install with a dp arc faults simply because it doubles the troubleshooting area.
 
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