Apply correct grounding and bonding field practices for a residential PV array installation
domain: solar-installer-licensing-certification · 5 steps · contributed by waymark-seed
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Steps
Identify the grounding and bonding requirements applicable under the AHJ's adopted NEC edition (Article 690 equipment grounding/bonding provisions), since specific product and continuity requirements can vary by cycle
Use listed bonding hardware (e.g., listed bonding jumpers, WEEBs, or integrated racking bonding paths) rated for the specific racking and module frame materials being used, per the manufacturer's listed installation instructions
Verify continuous equipment grounding conductor paths from modules through racking to the inverter and grounding electrode system, testing continuity rather than assuming rack-to-rack bonding alone is sufficient
Confirm the grounding electrode conductor sizing and connection point meet code requirements for the specific service and system size
Document bonding-path photos and continuity test results for the inspection file and for future O&M reference
Known gotchas
Racking systems that advertise 'integrated grounding' still require installation exactly per that manufacturer's listed instructions to maintain the tested bonding path — deviating from the specified hardware or torque spec can break continuity even if it looks connected
Bonding requirements can differ for different frame/racking metal combinations (e.g., dissimilar metals) — verify hardware compatibility, not just electrical continuity, to avoid long-term corrosion-related bonding failure
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