Which of the following items would indicate HV presence that you should treat as hazardous?

• A. Blue connectors
• B. Regular engine screws
• C. Visible orange components, warning labels, and service disconnects
• D. Normal chassis brackets

Answer: (C)

In high-voltage safety, clear visual cues are used to signal that a system could be hazardous and needs special precautions. The best indicator is the presence of visible orange components, warning labels, and service disconnects. Orange is the standard color used in EVs and hybrids to mark high‑voltage parts, so seeing orange signals that you’re dealing with HV and should treat it as dangerous. Warning labels reinforce the risk and guide you to follow proper safety steps, PPE, and procedures. A service disconnect shows there is a way to isolate the HV system before work, which is a direct cue to stop and confirm the system is de-energized before starting maintenance.

Blue connectors aren’t a universal HV signal on their own and could belong to other non-HV systems. Regular engine screws and normal chassis brackets are ordinary mechanical components without an indication of high-voltage risk.