What defines a "new" appliance circuit vs existing?

[tjmicsak]

"New" cooking and clothes dryer equipment circuits requires 4 wire cable and receptacle in place of the old SE 2 conductor and bare wrap when used.
Does changing just a range or dryer receptacle due to damage, or replacing a pigtail on the appliance qualify it as new circuit now, or is that defined as being limited to installing only new branch circuit cable? Where does the code spell that out specifically?

 

[don_resqcapt19]

Changing the appliance and/or its cord does not change the existing branch circuit. The exception to 250.140 permits the continued used of an existing branch circuit.

 

[hbiss]

I believe that if you move the receptacle location it triggers a re-wiring.

-Hal

 

[GoldDigger]

And changing the panel where it originates from service disconnect to subpanel would also trigger rewiring if neutral is uninsulated, IMHO.

 

[joebeadg]

I don't believe replacing the panel would require replacing existing appliance circuits using bare gr.

 

[LarryFine]

I don't believe replacing the panel would require replacing existing appliance circuits using bare gr.

Unless, as posted above, the existing panel is relegated as a 4-wire-fed sub-panel. This has been a rule for decades.

Plus, as a neutral doing double-duty as an EGC, and not the other way around, it had to be insulated unless SE cable.