What does it mean that the national standard for cables does not include inspection?

The national standard of wire and cable does not include testing. Strictly speaking, it is actually non-standard, and you need to decide whether to buy it according to your own situation.

PS: Different from the general non-standard, the national standard does not include inspection, which is generally not less than 5% of the national standard. You'd better go directly to the manufacturer for spot check. How much should I add if I want to check the cable? The redundant part is the missing part of the product.

The pressure of market competition is great, and the price of standard cable is high. Some users actually know this situation, but in order to save costs, they still choose this standard. In fact, many decoration companies use this standard, because electricians will reserve some current for safety reasons when calculating cable loss, and normal families basically do not have full power to turn on all electrical equipment. Without this 5%, it is actually no different from the formal national standard, but if it is sent for testing, it will be found to be unqualified products.

Of course, there are also some manufacturers who specialize in testing and produce products that can pass the inspection independently. To deal with this situation, first test the products that can pass the inspection, and then use the products that cannot pass the inspection. This situation is quite common in the industry. Mainly because the price of such products will also decline because of the decline in product quality, and many people will buy it even if they know it, because it is cheap.

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Many buyers can't distinguish such standards. When asked, they only asked whether the price and things were within the national standard, and basically did not ask, "If on-site sampling is needed, can the cable pass?" In fact, this is the most important point. Ask even if you don't do random inspection. At least you know this. Reflect the situation to the leaders and let them make decisions. Because in fact, in the event of a safety accident, if the cable is found to be unqualified when the responsibility needs to be investigated, the buyer will also bear the corresponding responsibility.