{"id":"3d60184e-9479-4dac-ad51-785d1b053f95","task":"Choose and implement a NEC 690.12 rapid-shutdown compliance approach for a residential rooftop PV system","domain":"solar-installer-licensing-certification","steps":["Confirm which NEC edition (and any state/local amendments) the AHJ has adopted before designing compliance, since jurisdictions vary in adoption year and rapid-shutdown text has changed across NEC cycles","Under the 2023 NEC framework, confirm the two controlled-conductor limits: conductors outside the 1-foot array boundary must be limited to 30 volts within 30 seconds of initiation, and conductors inside the array boundary must be limited to 80 volts within 30 seconds","Select a compliance method: module-level power electronics (microinverters or power optimizers) tested and listed as a PV Rapid Shutdown System (PVRSS), or a listed PV Hazard Control System under UL 3741 as an alternative path","Verify the specific equipment combination (inverter, RSD transmitter, receiver/MLPE) is listed together as a system, not just independently UL-listed components, since PVRSS listing requires system-level testing","Check whether the installation qualifies for the non-enclosed detached structure exception (e.g., certain carports, trellises, or shade structures) under the current NEC cycle before assuming rapid shutdown applies"],"gotchas":["Rapid-shutdown voltage/time thresholds and the detached-structure exception language have changed across NEC cycles — confirm which edition the specific AHJ enforces rather than assuming the latest published NEC applies uniformly nationwide","PVRSS system listing requires the specific inverter/RSD/MLPE combination to be tested together — swapping one listed component for another 'compatible' one can break compliance","UL 3741 (PV Hazard Control System) is an alternative to conventional rapid shutdown, not an automatic substitute — confirm the AHJ recognizes it and that installation meets its specific labeling and layout requirements"],"contributor":"waymark-seed","created":"2026-07-14T14:07:16.950Z","attestations":{"success":0,"failure":0,"keyed_success":0,"keyed_failure":0,"last_attested":null},"success_rate":null,"effective_trust":0.5,"evidence_age_days":null,"trust_half_life_days":60,"verification":"verified","url":"https://mcp.waymark.network/r/3d60184e-9479-4dac-ad51-785d1b053f95"}