Power circuit grounding of cable trays is explained in CTI Technical Bulletins, Titles No. 8, 11, and 12, and the National Electrical Code Sections 318-3-© and 318-7. It is also covered in NEMA Standard VE-2. These definitions are NEC terminology and apply to power system grounding. 8, 11, and 12, and the. Grounding and bonding are the structural core of a compliant, resilient installation. This guide breaks down the hardware, standards, and field methods that ensure continuity—from UL 467‑listed lugs and compression connectors to shield termination, tray bonding, and raised‑floor equipotential. Knowing the difference is what makes the difference! If your EGC is the raceway or cable tray containing the conductors (rather than a wire-type EGC), it will be larger than the phase conductors and you don't need to bother with the table. It involves connecting cable trays to the facility's grounding system, providing a low-impedance path for fault currents and protecting personnel. Cable tray may be used as the Equipment Grounding Conductor (EGC) in any installation where qualified persons will service the installed cable tray system. But, how do you make sure your grounding system works as it should? Let's dive in.