What grounding/bonding is necessary for cable tray when it is not to be used as the equipment grounding conductor (EGC)? How is the tray bonded at the power source? Is it necessary to bond conduits that enter the tray system? Is it necessary to bond trays to end equipment such as switchgear or MCC's? What is the minimum grounding requirement for trays if an EGC is part of the multiconductor power cable? I know this is alot, but the code does not elaborate far enough in ART.250.96 "Bonding Other Enclosures"
Thanks,
Fred Pakler
Thanks,
Fred Pakler