What is a key consideration when working near hybrid or electric vehicle high-voltage systems?

What is a key consideration when working near hybrid or electric vehicle high-voltage systems?

• A. High-voltage components can be energized; isolate the battery, follow manufacturer guidance, and maintain safe distances.
• B. High-voltage systems are always safe to touch.
• C. Engine compartment should be cooled before any work.
• D. No special precautions are required.

Answer: (D)

When working near a hybrid or electric vehicle’s high-voltage system, the main risk is that energized high-voltage components can deliver a dangerous shock or arc even after the vehicle is off. The best practice is to isolate the high-voltage battery and follow the manufacturer’s de-energization procedures, then maintain safe distances from HV components. This matters because these systems can still be energized or hold stored energy in capacitors, so simply assuming they’re safe is not reliable. Following the manufacturer guidance ensures you use the correct disconnects and sequencing for that vehicle, reducing the chance of shock or inadvertent re-energization. Establish a hazard zone, use appropriate PPE if applicable, and avoid contact with high-voltage cables or components until you have verified de-energization.

When working near a hybrid or electric vehicle’s high-voltage system, the main risk is that energized high-voltage components can deliver a dangerous shock or arc even after the vehicle is off. The best practice is to isolate the high-voltage battery and follow the manufacturer’s de-energization procedures, then maintain safe distances from HV components. This matters because these systems can still be energized or hold stored energy in capacitors, so simply assuming they’re safe is not reliable. Following the manufacturer guidance ensures you use the correct disconnects and sequencing for that vehicle, reducing the chance of shock or inadvertent re-energization. Establish a hazard zone, use appropriate PPE if applicable, and avoid contact with high-voltage cables or components until you have verified de-energization.