SHD GC cable has a thickened sheath and is suitable for scenarios with high mechanical strength requirements (such as direct burial and pipeline laying). It is widely used in places where there is a risk of mechanical damage, such as mines and port machinery. The core breakthrough of SHD-GC is to integrate the grounding conductor (GC) into the cable structure, usually using bare copper wire or green insulated wire placed in parallel in the center of the cable core. This design directly corresponds to the mandatory grounding requirements of the North American Electrical Code (NEC 250.122), and completely solves the risk of missing or misconnecting the grounding wire in traditional construction. For example, in the explosion-proof area of oil drilling platforms, independent grounding wires need to be laid along the same path as the phase wire to avoid potential differences, and the integrated structure of SHD-GC naturally meets this condition. Measured data shows that the cross-sectional area of its grounding wire strictly matches the current carrying capacity of the phase wire (such as a 500kcmil phase wire with a 2/0 AWG grounding wire), and the ground fault current shunt efficiency is 40% higher than that of external grounding. At the same time, this design reduces installation hours by 30% and avoids NEC acceptance failures due to substandard grounding systems. It is especially suitable for high-risk scenarios such as FDA-regulated pharmaceutical plants.
