2.20.

 "High voltage bus" means the electrical circuit, including the coupling system for charging the REESS that operates on high voltage.
Where electrical circuits, that are galvanically connected to each other, are galvanically connected to the electrical chassis and the maximum voltage between any live part and the electrical chassis or any exposed conductive part is ≤ V AC and ≤ 60 V DC, only the components or parts of the electric circuit that operate on high voltage are classified as a high voltage bus.

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2.20. "High voltage bus" means the electrical circuit, including the coupling system for charging the REESS that operates on high voltage. a0c0