List three signs that indicate a potential high‑voltage hazard in an EV.

• A. Orange components, warning labels, service disconnect presence; sometimes blue connectors or high‑voltage symbols.
• B. Only blue connectors indicate hazard.
• C. Any metal part is a HV hazard.
• D. A loud alarm indicates hazard.

Answer: (A)

Recognizing high‑voltage safety risk in EVs relies on visual and design cues that the manufacturer uses to indicate hazardous energy. Three reliable cues are orange-colored components, warning labels, and the presence of a service disconnect. The orange color signals high-voltage parts like battery modules, cables, and power electronics, helping technicians quickly spot what needs extra precautions. Warning labels and high‑voltage symbols reinforce the danger and remind you to follow proper procedures before touching anything. The service disconnect is a deliberate safety feature that allows the HV system to be isolated, so work can be done without energizing the high‑voltage circuit.

Blue connectors or symbols can appear as additional cues in some designs, but they’re not universal indicators on their own. And metal parts or a loud alarm aren’t reliable indicators of HV hazard by themselves: metal parts aren’t automatically energized, and an alarm may or may not be present or audible in every situation. The combination of orange components, warning labels, and a service disconnect provides the most consistent signal of a potential high‑voltage hazard.