xEV High-Voltage Safety Checklist
A generic pre-work checklist for working on or near hybrid and electric vehicle high-voltage systems. Every step links ASE's xEV safety standard or the OSHA rule it comes from.
These steps are generic. ASE's standard says the technician shall refer to the vehicle manufacturer's (OEM) repair and de-energizing procedures before proceeding. Use this list alongside them, not instead of them.
Who should do this work
ASE's Level ONE (electrically aware person) is for anyone who may encounter an EV at work, for tasks not related to high-voltage systems. Level TWO (high-voltage vehicle technician) covers isolating and verifying the high-voltage system, securing it against activation, and general work on de-energized high-voltage systems (ASE: xEV Safety Certifications, Level ONE standard).
Sources
- ASE xEV High-Voltage Electrical Safety Standards, Level TWO, Version 2.1 (Jan 14, 2025)
- ASE: xEV Safety Certifications
- ASE Certification Test Series
- 29 CFR 1910.333 Selection and use of work practices
- 29 CFR 1910.137 Electrical protective equipment
- 29 CFR 1910.147 Lockout/tagout
eCFR title 29 current to Oct 15, 2026. Checked Oct 18, 2026. Reference only, not legal advice.