PV Panel Grounding: Difference between revisions
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*690.45 - size of PV equipment grounding conductors - [[Table 250.122]] + no less than 14 ga. | *690.45 - size of PV equipment grounding conductors - [[Table 250.122]] + no less than 14 ga. | ||
*690.9(A) says that we don't need overcurrent device for PV if the wires can handle short current capacity of PV. But good luck trying to convince a code official. | *690.9(A) says that we don't need overcurrent device for PV if the wires can handle short current capacity of PV. But good luck trying to convince a code official. | ||
*PV Grounding PDF [http://solarabcs.org/about/publications/reports/systemgrounding/pdfs/SystemGrounding_studyreport.pdf]. ''Although the NEC does | *PV Grounding PDF [http://solarabcs.org/about/publications/reports/systemgrounding/pdfs/SystemGrounding_studyreport.pdf]. ''Although the NEC does not specifically require all equipment to be certified/listed, many local jurisdictions and many AHJs establish requirements that all equipment be certified/listed because they feel | ||
not specifically require all equipment to be certified/listed, many local jurisdictions and many AHJs establish requirements that all equipment be certified/listed because they feel | |||
unqualified to examine uncertified/unlisted equipment for safety as the NEC requires.'' | unqualified to examine uncertified/unlisted equipment for safety as the NEC requires.'' | ||
Revision as of 21:08, 15 September 2023
NEC 690 - Covers PV Systems
- 690.45 - size of PV equipment grounding conductors - Table 250.122 + no less than 14 ga.
- 690.9(A) says that we don't need overcurrent device for PV if the wires can handle short current capacity of PV. But good luck trying to convince a code official.
- PV Grounding PDF [1]. Although the NEC does not specifically require all equipment to be certified/listed, many local jurisdictions and many AHJs establish requirements that all equipment be certified/listed because they feel
unqualified to examine uncertified/unlisted equipment for safety as the NEC requires.
Equipment Grounding
- PV panels should follow electrical grounding conductor sizes - [2]
- Ie, for 30A DC, we need 10 ga ground.
- PV frames must be connected to PV system equipment grounding conductor [3]
- After leaving the PV array, the equipment ground must run together with the power wires. [4]
What Size Grounding Conductor on PV Panels?
- Australia rules - appear to say 6 ga for lightning protection, and 12 ga for frame grounding [5]
- 6 ga USA if 'subject to damage'?