Multi wire ckts

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Old 12-20-07, 03:56 PM
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Multi wire ckts

Is there anything , either code or practical, that would prevent two Tandem breakers with the centers "Handle tied" from being used on a MWBC?
 
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Old 12-20-07, 04:35 PM
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Well, I suppose as long as they are both mechanically interconnected it would work, and a quick flip of my code book [little outdated] but good none the less doesn't show anything ...
 
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Old 12-20-07, 05:41 PM
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IF by two tandem breakers you mean 4 breakers total then not unless both hots land on the same yoke requiring a handle tie. Mulitwire requires one breaker to be on each leg. Most double tandems won't do that.
 
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Old 12-20-07, 06:29 PM
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You mean each leg has to be on an opposing phase, correct?
 
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Old 12-21-07, 12:34 AM
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Originally Posted by Unclediezel View Post
Is there anything , either code or practical, that would prevent two Tandem breakers with the centers "Handle tied" from being used on a MWBC?
no the code is very spefic on this one.

what you refering to the QUAD breaker type like this there is few verison of the quad breaker some have common trip in the center two and outer two is indepent trip and some are common trip on the outer two breaker like what i show ya on the photo.

btw the 08 code cycle is very speficed on this one this will used on MWBC or a single youk [sp] with a split circuit duplex [ only used if two diffrent circuits landed there if the one half of duplex is switched then you dont used the MWBC rules at all ]

Merci, Marc
 
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Old 12-21-07, 06:20 AM
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Originally Posted by burkej62 View Post
You mean each leg has to be on an opposing phase, correct?
It's a matter terms. Home wiring is only single phase. While commonly refered as two phases it is more properly called legs.
To clarify you must have 240 volts between the two hot wires of a multi wire circuit.
 
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