What does a blue wire in hybrid electric vehicles indicate?

In hybrid electric vehicles, a blue wire typically indicates a low or medium voltage cable. This color coding helps to differentiate it from high voltage cables, which are often identified with different colors to prevent confusion and ensure safety during maintenance and rescue operations.

Recognizing the purpose of color coding in wiring is crucial for emergency responders and technicians. It aids in quickly identifying the type of electrical components they are dealing with, especially in high-stakes scenarios such as accidents where hybrid vehicles may contain multiple electrical systems.

Different colors are used for high voltage cables—often orange or yellow—while data cables and lighting wires will have their own specific color designations. Understanding these distinctions is vital for personnel working on or around hybrid electric vehicles to ensure proper handling and to reduce the risk of electrical shock or system failure.