RDF (Changzhou) Electrical Technology Co., Ltd.
How to choose the appropriate wiring harness for your electric vehicle?
Release time：
2025-11-26
Choosing the appropriate wiring harness for one's electric vehicle involves matching the vehicle's voltage/current requirements, adapting to usage scenarios, and ensuring safety and durability.
Choosing the appropriate wiring harness for one's electric vehicle involves matching the vehicle's voltage/current requirements, adapting to usage scenarios, and ensuring safety and durability. It is necessary to gradually screen from four dimensions: "core parameters, scenario adaptation, quality identification, and installation compatibility" to avoid problems such as short circuits, heating, and power attenuation caused by mismatched wiring harnesses.
The core function of a wiring harness is to transmit power and signals. Parameter mismatch can directly cause safety hazards, and three key information about the vehicle need to be confirmed first:
1. Voltage level: High voltage/low voltage must strictly correspond
Electric vehicle wiring harnesses are divided into high-voltage wiring harnesses (used for batteries, motors, controllers, fast charging interfaces, etc.) and low-voltage wiring harnesses (used for headlights, instruments, sensors, USB interfaces, etc.), and the two cannot be mixed:
Confirm vehicle voltage: Common electric vehicle voltages include 48V (for scooters and scooters), 60V/72V (for medium to high speed electric vehicles and tricycles), and 300V+(for new energy vehicles); Low voltage systems are mostly 12V (auxiliary appliances).
Selection requirements: High voltage components must use high-voltage wiring harnesses labeled with "corresponding voltage+withstand voltage level" (such as high-voltage wiring harnesses with withstand voltage ≥ 250V for 60V vehicles), low-voltage components must use low-voltage wiring harnesses, and high-voltage wiring harnesses must have shielding layers (anti electromagnetic interference) and flame-retardant design.
2. Current carrying capacity: The wire diameter determines the "current carrying capacity", it is better to have a large current than a small one.
Previous page
Previous page
Latest From the Blog
