unbalanced ungrounded

[kimrichi]

how come we calcualate neutral load at 70 percent oe ungrounded load in dryers and cookinging equipment
how there is unbalanced load to start with

 

[Smart $]

how come we calcualate neutral load at 70 percent oe ungrounded load in dryers and cookinging equipment
how there is unbalanced load to start with

If you are referring to 220.61(B)(1), those will always be grounded-system circuits, and most have a grounded conductor (i.e. 3-wire branch circuits). If this doesn't answer your question, please elaborate...