Elevator Safety Circuits, Governors, and Code Compliance

This course prepares technicians to analyze, troubleshoot, and maintain the electromechanical safety systems essential to elevator operations. Students explore the architecture of critical safety circuits, tracing electrical interlocks, hoistway switches, final limits, and emergency stop devices. Mechanical arresting systems are examined in detail, emphasizing the operational theory, calibration, and tripping mechanisms of overspeed governors paired with type A, B, and C car safeties. Rigorous alignment with jurisdictional safety codes forms a core component, guiding students through formal testing procedures, buffer engagement standards, and clearance verifications. Through systematic electrical schematics analysis, hands-on diagnostics, and compliance evaluations, learners master methods to locate faults and verify fail-safe conditions without compromising passenger protection. By emphasizing systematic testing methodologies, code interpretation, and risk mitigation, this course reinforces the technical precision and safety-critical mindset required for professional field service across varied vertical transportation environments.

InstructorJacob Calhoun

Prerequisites

ELV 101

Course outline

Lectures, virtual labs, and graded assignments — completed in your browser.

01Lesson 1: Introduction to Elevator Safety Codes and Standard Regulationslecture

02Lesson 2: Electrical Safety Circuit Architecture and Series Logiclecture

03Lesson 3: Hoistway Limit Switches, Directional Limits, and Pit Controlslecture

04Hands-on Lab: Safety String Tracing, Continuity Testing, and Fault Simulationlab

05Lesson 5: Centrifugal and Flyball Overspeed Governor Mechanical Operationlecture

06Lesson 6: Type A, B, and C Car and Counterweight Safety Arresting Systemslecture

07Lesson 7: Oil and Spring Buffer Mechanics, Ratings, and Stroke Metricslecture

08Hands-on Lab: Governor Calibration, Tripping Speed, and Pull-Through Testinglab

09Lesson 9: Ascending Car Overspeed and Unintended Car Movement Protection Systemslecture

10Lesson 10: Emergency Power Sequencing and Firefighters' Emergency Operationslecture

11Hands-on Lab: Mechanical Safety Engagement and Dynamic Buffer Verificationlab

12Lesson 12: Hoistway, Pit, and Machine Room Code Clearances and Guardinglecture

13Lesson 13: Periodic Safety Inspection Procedures and Compliance Recordkeepinglecture

14Capstone Service Project: Integrated Safety Circuit and Mechanical Proof Testassignment

Syllabus

["Week 1: Lesson 1: Introduction to Elevator Safety Codes and Standard Regulations", "Week 2: Lesson 2: Electrical Safety Circuit Architecture and Series Logic", "Week 3: Lesson 3: Hoistway Limit Switches, Directional Limits, and Pit Controls", "Week 4: Hands-on Lab: Safety String Tracing, Continuity Testing, and Fault Simulation", "Week 5: Lesson 5: Centrifugal and Flyball Overspeed Governor Mechanical Operation", "Week 6: Lesson 6: Type A, B, and C Car and Counterweight Safety Arresting Systems", "Week 7: Lesson 7: Oil and Spring Buffer Mechanics, Ratings, and Stroke Metrics", "Week 8: Hands-on Lab: Governor Calibration, Tripping Speed, and Pull-Through Testing", "Week 9: Lesson 9: Ascending Car Overspeed and Unintended Car Movement Protection Systems", "Week 10: Lesson 10: Emergency Power Sequencing and Firefighters' Emergency Operations", "Week 11: Hands-on Lab: Mechanical Safety Engagement and Dynamic Buffer Verification", "Week 12: Lesson 12: Hoistway, Pit, and Machine Room Code Clearances and Guarding", "Week 13: Lesson 13: Periodic Safety Inspection Procedures and Compliance Recordkeeping", "Week 14: Capstone Service Project: Integrated Safety Circuit and Mechanical Proof Test"]