Code Compliant/Possible?

[infinity]

Section 2 would allow this, but only if the clothes dryer had only line to line loads. Most sold in the US run the motor off a line to neutral connection, making Section 2 inapplicable.

Yes that's it. If the appliance branch circuit is a 3 wire MWBC (H-N-H) then you cannot use two single pole CB's with a handle tie because one CB could trip and still leave half of the circuit energized. An internal trip, multi-pole CB solves that problem.

 

[jaggedben]

Section 2 would allow this, but only if the clothes dryer had only line to line loads. Most sold in the US run the motor off a line to neutral connection, making Section 2 inapplicable.

Yes that's it. If the appliance branch circuit is a 3 wire MWBC (H-N-H) then you cannot use two single pole CB's with a handle tie because one CB could trip and still leave half of the circuit energized. An internal trip, multi-pole CB solves that problem.

Then why doesn't section 2 have the word 'only' in it, like section 1?

 

[JFletcher]

Deleted

 

[infinity]

Then why doesn't section 2 have the word 'only' in it, like section 1?

It's not really needed. (2) is pretty clear that it's only for line to line circuits and there is no neutral. If there were a neutral then (1) would apply.