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Technical Note about Enphase Microinverter System Grounding

Electrical code requires two types of grounding conductors: the Grounding Electrode Conductor (GEC), which is used between the grounding electrode and the point where a normally current carrying conductor is intentionally bonded to ground, and the Equipment Grounding Conductor (EGC), which grounds noncurrent carrying metal parts of the system, such as the racking and module […]

Electrical code requires two types of grounding conductors: the Grounding Electrode Conductor (GEC), which is used between the grounding electrode and the point where a normally current carrying conductor is intentionally bonded to ground, and the Equipment Grounding Conductor (EGC), which grounds noncurrent carrying metal parts of the system, such as the racking and module frames. Because Enphase Microinverters with Integrated Ground have DC integrated ground (the DC circuit is isolated and insulated from ground), they do not require a GEC. Additionally, the Equipment Ground requirement is met for the microinverter because the ground conductor (the green wire internal to the Engage Cable) acts as the EGC.