Looking for insight on a few questions:
Are the feeders for a subpanel sized at the table 316.10 size because the wires are considered branch circuits coming from the main panel?
Example:
200A main panel single phase
100A subpanel
75 degree rated lugs
SER from main panel to sub panel
Given the loads for the sub panel are an unknown mix of continuous and non continuous I would suppose sizing at 100% continuous.
Am I correct the cable would need to be #1 copper or 2/0 aluminum because 125% of 100A puts me there or am I oversizing?
Second:
200A breaker in 1600A main switchgear three phase 120/208
200A subpanel three phase
Conduit run to subpanel
Again unsure of continuous vs non-continuous
I assume needing to size at 100% continuous
Would I need 250kcmil copper, or could I go smaller because I thought there was a three phase multiplier to reduce the needed amperage size. Or again am I missing something and oversizing?
Thanks for the help.
