Equipment grounding is the connection to the ground of non-current-carrying conductive materials – e., cable trays, metallic conduits, junction boxes, transformer casings, and motor frames. In cabling projects, common wiring methods include overhead lines, cables, steel pipes, cable trays, and busbars. For systems with 110kV and above, where the neutral point is effectively grounded, the metal sheath of single-core cables should be directly connected to the substation grounding. If an EGC cable is installed in or on a cable tray, it should be bonded to each or alternate cable tray sections via grounding clamps (this is not required by the NEC® but it is a desirable practice). In addition to providing an electrical connection between the cable tray sections and the EGC, the. The drive system in this manual consists of the supply transformer, input power cable of the drive, the variable speed drive (frequency converter), motor cable and motor. 96 regardless of whether or not the cable tray is being used as an equipment grounding conductor (EGC). The EGC is the most important conductor in an electrical system as its function is electrical safety. It is also covered in NEMA Standard VE-2. The induced voltage between the.