This comprehensive technical guide presents standardized wiring diagrams for common combiner box configurations, explains grounding and bonding design principles per NEC requirements, demonstrates proper conductor sizing calculations, and provides troubleshooting guidance for.
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Bonding jumpers—short wires connecting separate sections of racking—are essential to ensure the entire metal structure has a continuous, low-resistance connection to ground. Always use grounding lugs, clips, and other components that are specifically listed and certified for PV.
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Lightning protection systems (LPS) provide a protective zone to assure against direct strikes to PV systems by utilizing basic principles of air terminals, down conductors, equipotential bonding, separation distances and a low‐impedance grounding electrode system.
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All you have to do is connect the equipment grounding conductor to one rail in each row, allowing all metal parts to bond to the grounding conductor.
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