LEDs and Power Quality

The Importance of Grounding — Part 2

Grounding LED luminaires at the branch circuit level

Before the days of electronic loads, equipment grounding conductors (EGCs) were not required at the branch circuit level. But with the advent of electronic-based ballasts for fluorescent and HID luminaires, EGCs — now required by the National Electrical Code (NEC) — act as a path for low- and high-frequency currents that the ballasts do not need, or better said, that the ballasts reject. These currents are made up of leakage currents, emissions currents, and disturbance currents.<

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