On 2008-01-28, Mike Dobony wrote:

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