Elevator Pit Inspection Control: EN 81-20 Stop Device, Hold-to-Run, Pit Lighting and Buffer Requirements

The pit inspection control station (pit inspection box) is required by EN 81-20 for all elevator pits deeper than 0.50 m. Requirements: (1) Stop device — a latching safety switch that cuts power to the drive when actuated; it must be accessible immediately upon entering the pit (within reach of the pit access door/ladder); (2) Inspection control switch — a key-operated or clearly marked two-position switch that transfers control to the pit station; (3) Hold-to-run operation — movement only occurs while the direction button is continuously held; (4) Speed limit — car movement restricted to ≤0.63 m/s (inspection speed) when pit control is active; (5) Priority — pit inspection takes priority over COP and HCP calls; (6) Lighting — EN 81-20 requires permanent pit lighting providing ≥50 lux at pit floor, with a switch at the pit access door and at the pit control station; (7) Pit ladder — a fixed ladder is required for pits deeper than 0.50 m. EN 81-20 also requires: a pit depth of ≥0.50 m (standard) or ≥1.10 m (enhanced, to provide standing space for engineers), a buffer at the bottom of travel for both car and counterweight, and a pit drain or waterproofing for pits prone to flooding. LOLER thorough examinations include the pit safety switch and lighting as mandatory check items.

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