Mandatory regulations:

Both China's GB/T 37133 and the European Union's ECE R118 specify that "high-voltage wiring harnesses with a rated voltage > AC 30 V or > DC 60 V must be colored orange".

RAL 2003 orange is the most conspicuous in the engine room, and it is immediately recognizable as "high-voltage electricity". Maintenance personnel should disconnect the power before starting any work.

Meanwhile, the orange paint has undergone 105 temperature resistance and 96-hour salt spray testing, ensuring no fading, and its supply chain is also the most mature.