bonded

[domnic]

I have a building with a 120/240 volt service and a 240 volt corner grounded delta service . the delta service powers a 208/120 volt three phase panel (240 to120/208 transformer) should the services bonded together ?

 

[Smart $]

I have a building with a 120/240 volt service and a 240 volt corner grounded delta service . the delta service powers a 208/120 volt three phase panel (240 to120/208 transformer) should the services bonded together ?

Both services, and transformer secondary system if SDS and in the same building/structure, have to be connected to the same grounding electrode system, effectively bonding them all together. No additional bonding necessary.