Determining the quality of electrical components requires a comprehensive evaluation from five core aspects: visual inspection, parameter verification, certification markings, performance testing, and sourcing from legitimate channels to ensure safety and reliability.
Checking Appearance and Craftsmanship Details
Clear Markings: Qualified products should have complete information on the product itself and its packaging, including the manufacturer's name, model specifications, voltage and current ratings, and CCC certification mark. The lettering should be clear and not easily erased.
Superior Materials:
Conductor: The copper core should be purplish-red with a uniform luster and a soft, resilient feel; inferior products may appear darker, yellowish, or hard.
Insulation Layer: The insulation layer should be of uniform thickness, without air bubbles or off-center cores, and should be elastic to the touch; inferior products often have uneven thickness, are easily torn, or whitish when folded.
Verifying Key Electrical Parameters
Confirm that the rated voltage, current, power, and other parameters of the components match the intended use. For example, household lighting circuits commonly use 10A switches, while air conditioning circuits require 16A or higher.
Check the validity of the applicable standards stated on the product label. For example, wires and cables should comply with current national standards such as GB/T 5023 and JB/T 8734. Do not purchase products labeled with obsolete standards.
Verify the Mandatory Certification Mark
CCC certification is a mandatory safety certification for electrical products in China, applicable to most household electrical components such as switches, sockets, circuit breakers, and wires and cables.
You can verify the authenticity of product certification through the "National Certification and Accreditation Information Public Service Platform" to avoid counterfeit and substandard products.