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Re: Microwave problems--Microwave and Refrigerator sharing neutral wire.

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Subject Author Date
Re: Microwave problems--Microwave and Refrigerator sharing neutral wire. Wayne Whitney 01-28-2008
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Posted by Wayne Whitney on January 28, 2008, 12:56 pm

> RBM wrote:
>
> > It's called an Edison or multiwire branch circuit. It's perfectly
> > proper and legal.
>
> This is right now legal and acceptable, but will not be in August
> 2008 as the code is changing.

While there is a change in the 2008 NEC regarding multi-wire branch
circuits (MWBCs), it does not make them illegal. In the 2005 NEC, if
the MWBC served a single yoke with multiple devices, then a means of
disconnecting both legs simultaneously is required. In the 2008 NEC,
this is always required. The practical implication for residential
work is that you have use a double pole breaker.

Cheers, Wayne

Posted by Wayne Whitney on January 28, 2008, 1:01 pm

> While there is a change in the 2008 NEC regarding multi-wire branch
> circuits (MWBCs), it does not make them illegal. In the 2005 NEC,
> if the MWBC served a single yoke with multiple devices, then a means
> of disconnecting both legs simultaneously is required. In the 2008
> NEC, this is always required. The practical implication for
> residential work is that you have use a double pole breaker.

That should say that you have to use a double pole breaker with handle
tie.

Cheers, Wayne

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