Quote Originally Posted by tld38 View Post
Infinity, thank you for your feedback. if you look at the 1st page of the thread, you will see the ACME drawing for the Xfmr I am going to install. It looks like the core is grounded to the case. I want to run the EGC from the 277/480 volt panel feeding the primary and bond to the Xfmr case. I will then run 3 hots with a SSBJ from the secondary to the 240 volt 3 phase panel. I will bond the SSBJ to the Xfmr case and the 240 volt 3 phase panel as well. I will bond the 240 volt 3 phase panel with the factory bonding screw or strap that is provided from the factory as well. I will then run a GEC from the Xfmr case to building steel. I do not need to derive a neutral from the separately derived system as there is no neutrals needed at the 240 volt 3 phase panel.

Am I on the right path here? Thanks
You SBJ goes either in the transformer or the panel not in both.