PV Panel Grounding

NEC 690 - Covers PV Systems

• 690.45 - size of PV equipment grounding conductors -

Equipment Grounding

• PV panels should follow electrical grounding conductor sizes - [1]
• Ie, for 30A DC, we need 10 ga ground.
• PV frames must be connected to PV system equipment grounding conductor [2]
• After leaving the PV array, the equipment ground must run together with the power wires. [3]

What Size Grounding Conductor on PV Panels?

• Australia rules - appear to say 6 ga for lightning protection, and 12 ga for frame grounding [4]
• 6 ga USA if 'subject to damage'?