sorry another dumb question guys
voltage to ground in 110.26 table
208 is only between phases, right?
240 is only between phases, right?
480 is where I get lost, delta, Y, ungrounded and grounded

i figured out that i was still having trouble with this when i looked at 2 AH units on a roof that were about 2 feet apart. there are doors between them with controls inside and i dont remember if it was 208 or higher, but it bothered me that i didn't know which column applied in the 110.26 table, over 150v or not

so here i am, any help? diagrams on-line or simple explanations wanted, thanks