Guidelines for Material Selection and Safe Use of DC EV Charger

2026,10,30

Although DC EV Charger may seem structurally simple, material selection is directly related to charging safety and equipment lifespan, and consumers need to pay extra attention when purchasing and installing them.

All‑in‑one DC Fast Charging Device for EVs

Experts point out that the quality of pile filling in the current market varies greatly, and some low-priced products cut corners on core materials to reduce costs, laying serious safety hazards.

The key lies in the selection of wires: it is necessary to choose high-purity oxygen free copper core cables, which have low resistivity, stable conductivity, and low heat generation; Although aluminum wire is cheap, it has high resistivity and is prone to oxidation. The risk of heating and aging increases sharply when high currents pass through it for a long time, which is one of the main causes of fire accidents.

The wire diameter specifications also need to be strictly matched with the charging power. For example, it is recommended to use at least 4 square millimeters of copper cable for a 7kW AC pile, and upgrade accordingly for higher power.

Secondly, in terms of shell materials, excellent products often use halogen-free flame-retardant PC or PC/ABS alloys, which can self extinguish and have low smoke toxicity when exposed to fire, while also possessing good mechanical strength and outdoor weather resistance; Poor quality shells may use recycled plastics, which are prone to deformation and cracking when heated.

The installation process should also not be ignored. Do not purchase cheap wires by yourself and find non electricians to connect them privately. There have been real cases where overloading caused fires due to thin wire diameter and loose crimping of wiring terminals.

In the end, due to illegal installation, the insurance company refused to compensate, resulting in heavy losses. It is recommended that consumers prioritize brand products that have passed 3C certification and hire qualified installation teams to standardize construction.

Author:

Mr. yjfastener

E-mail:

hou@citool.com

Phone/WhatsApp:

+86 19112379069