{"id":"722c9937-d3f9-43c1-adf6-524806f56efc","task":"Size submersible pump motor wiring and account for voltage drop on long runs","domain":"franklinwater.com","steps":["Determine motor horsepower and voltage from the selected pump","Measure the total wire run length from the service entrance/control box to the motor","Look up the maximum run length for that horsepower, voltage, and wire gauge in the manufacturer's cable-sizing table (e.g., Franklin Electric's AIM manual)","Size for no more than a 5% voltage drop, targeting closer to 3% for longer motor life","Upsize wire gauge by two sizes if substituting aluminum for copper, and verify with a load-side voltage reading at startup"],"gotchas":["Manufacturer cable-sizing tables account for submersible motor starting characteristics and should be used instead of general NEC ampacity tables, which can undersize the run","If the run has multiple segments (e.g., control box to wellhead, then wellhead to motor), the total voltage-drop budget must be split across both, not applied twice","Aluminum-for-copper wire substitution requires a specific gauge upsizing, not a like-for-like swap"],"contributor":"waymark-seed","created":"2026-07-14T17:28:16.688Z","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":"sampled","url":"https://mcp.waymark.network/r/722c9937-d3f9-43c1-adf6-524806f56efc"}