Should the cable be run in a cable tray or along the ground
Single conductor cables do not include an EGC; however, standard practice is for a separate ground wire to run along the side of the cable tray. Cable tray may be used as the Equipment Grounding Conductor (EGC) in any installation where qualified persons will service the installed cable tray system. This is a description of how to select, install, and support these metal or plastic frames, on which electrical wires are installed. It involves connecting cable trays to the facility's grounding system, providing a low-impedance path for fault currents and protecting personnel.
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