Check out 2 gensets with a 3-pole xfer switch. Genset 1 gets bonded (N-G).. GENSET 2 gets no MBJ therenot seprately derived systems unless we install a 4-pole Xfer switch.. we would then bond both of them (N-G).. once the neutrals are switched they are separately derived and each need to be...
Please check out the attachment. This is the diagram that shows how the system is connected.
Thanks again http://files.engineering.com/getfile.aspx?folder=2e10ced2-f914-4c05-ad5c-887d2361f421&file=2_Gen_Sets_3-pole_Transfer_switch.doc
I have 2 gensets and no utility power.The bondinging jumper (N-G) is at genset 1.. 250.20(d)fpn 1.
Genset 2 is not bonded.. An equipment grounding conductor is installed from both gensets to xfer switch to MDP to SDPs.
A better (safer) design that you mention would be to install main bonding...
I have two gensets feeding a manual 3-pole xfer switch. It feeds an MDP which then feeds 8 SDPs. All 5 wire. 3-phase 4-wire and 1 Equipment grounding conductor. Genset 1 is bonded ,the other is not per the NEC. I have checked for an internal bond at genset 2 but dont get a continuity reading...
