My post wasn't in reply to the OP.
Regarding the OP, he did not state the pertinent ratings, but it sounds as the main to the skid is a feeder tap. OCP is required at one end or the other at the very least, as the current installation appears to have taps tapping a tap.
If there is no OCPD's at the skid then there is no feeder, it becomes an uncontrolled current load that can easily overload this tap, so this makes it a branch circuit tap that doesn't meet the rules in 210.19
Ya I know but I was just picking up on how he wrote it, like you said, it sounds like taps tapping a tap without any OCPDs for the smaller loads, which is why I pointed out the danger of the small EGCs that could be damaged if a fault was to happen in these smaller loads.
Their current installation is a gutter on the power skid from which they tap to conductors sized to the various equipment loads.
Like I pointed out he needs a panel with a main breaker at the skid so they could protect these smaller conductors as well as protect the main tap conductors from being overloaded, fault protection for the main tap conductors is done via the 10x rule and the 10' limit.
This is like using this main tap to feed a bunch of receptacles at the skid, you have no way of controlling the load from over loading the main tap conductor, this is what I meant by uncontrolled tap which is not allowed by the NEC, which is why tapping a tap is not allowed.
