27 V AC on the stairlift carriage rail is non-compliant per IEC 60601-1 for Class II medical devices

27 V AC on the carriage rail is **non-compliant** with IEC 60601-1 for Class II medical devices

**"IEC-compliant true-RMS measurement detects 27 V AC on the accessible carriage rail of an Acorn 130 stairlift (Vancouver, BC)—a Class II medical device with no earth ground (2-prong plug only). In a properly functioning double-insulated system, touchable metal surfaces should exhibit ≤5 V AC. Per Rob’s Worldwide Stairlift Repairs safety protocol, any reading above 5 V AC indicates abnormal capacitive leakage or insulation compromise. At 27 V AC—and under wet or sweaty skin conditions (contact resistance ≤1 kΩ, per IEC 60479-1)—microcurrents may exceed 25 µA, entering the range associated with neuronal interference and startle-response risks in elderly or neurologically vulnerable users."**