310.15(B)(6)

[aftershock]

This table is for 120/240-volt 3 wire single phase. Is there a table for 4 wire 120/208 volt 3- phase?

 

[Dennis Alwon]

This table is for 120/240-volt 3 wire single phase. Is there a table for 4 wire 120/208 volt 3- phase?

Yes it is called 310.16

 

[aftershock]

Thank you. I did not see "service" listed in that table.

 

[charlie b]

310.16 works for services, feeders, and branch circuits. 310.15(B)(6) works only for services, and only under limited circumstances.