The thing that was bothering me is it's pretty clear to me that the EGC in each cable must be sized per 250.122 and I'm not sure what size that wire is in the SER cable. I'm sure it's sized to match the requirements lets say for a single cable but you might have to order it special if you start paralleling them together. But if you look at Table 250.122 it tells me what size that conductor needs to be in relation to the overcurrent device on the circuit or feeder.
