What safety step is essential when dealing with high-voltage components in electric-hybrid vehicles during extrication?

What safety step is essential when dealing with high-voltage components in electric-hybrid vehicles during extrication?

• A. Ignore the electrical system and focus on mechanical hazards.
• B. Let the battery discharge itself.
• C. Isolate the high-voltage source before work and wear appropriate PPE.
• D. Only work with ignition keys removed.

Answer: (C)

The essential step is to isolate the high-voltage source before you begin work and to wear appropriate PPE. High-voltage systems in electric-hybrid vehicles can store energy and remain energized even after the vehicle is powered down, so simply turning off the ignition or removing keys does not guarantee safety. Isolating the HV source—using the vehicle’s service disconnect or other manufacturer-approved methods and applying lockout/tagout as needed—removes the energy path and prevents accidental re-energization during extrusion. Wearing the right PPE, such as dielectric gloves, eye/face protection, and arc-rated clothing or insulating gear, protects you from electric shock, burns, or arc flash if a fault occurs. Ignoring the electrical system or relying on the battery to discharge itself is unsafe and can lead to severe injuries.

The essential step is to isolate the high-voltage source before you begin work and to wear appropriate PPE. High-voltage systems in electric-hybrid vehicles can store energy and remain energized even after the vehicle is powered down, so simply turning off the ignition or removing keys does not guarantee safety. Isolating the HV source—using the vehicle’s service disconnect or other manufacturer-approved methods and applying lockout/tagout as needed—removes the energy path and prevents accidental re-energization during extrusion. Wearing the right PPE, such as dielectric gloves, eye/face protection, and arc-rated clothing or insulating gear, protects you from electric shock, burns, or arc flash if a fault occurs. Ignoring the electrical system or relying on the battery to discharge itself is unsafe and can lead to severe injuries.