How many square meters is a nominal value stipulated in the national standard, and how many square meters are used by users to select wires and cables based on their load.

The number of square meters of wires is a colloquial term in decoration and plumbing construction. The number of square meters of wires that is often mentioned does not include the unit, that is, square millimeters.

The square of the wire actually refers to the cross-sectional area of ??the wire, that is, the area of ??the circular cross-section of the wire, in square millimeters.

Extended information:

Purchasing Points

As the main carrier of power transmission, wires and cables are widely used in electrical equipment, lighting lines, household appliances, etc. Its quality directly affects the quality of the project and the safety of consumers' lives and property. There are many types of wires on the market, and you should choose the appropriate wire according to your own electrical load.

Some of the wires sold in the market are cheap and some are more expensive. Some people tend to compare the cheaper wires first. However, many of the cheap wires often fail to achieve the performance he explained. It may bring you many safety risks.

The production technology of wires is not too high, and the raw materials are not very different. If they are too cheap, they are either cutting corners or not providing enough quantity. So how to identify it. Let me tell you a few methods that are easier to identify:

1. Look at the packaging. National standard wires are often better made, neat and have a sense of quality when held in hand.

2. Open the package and take a look at the wires inside. The national standard wires of 1.5--6 square meters require a skin thickness (insulation thickness) of 0.7mm. If it is too thick, it is non-standard. Correspondingly The inner core is definitely not enough. You can pull the thread with force. If it is not easy to tear, it is usually the national standard.

3. Burn it with fire and extinguish it within 5 seconds after leaving. Those with certain flame retardant functions are national standards.

4. Look at the inner core. The higher the brightness of the inner core material (copper), the better the copper quality. The brightness is uniform, shiny and has no layering. National standards require that the inner core must be made of oxygen-free copper. Non-standard products such as black rod copper may pose accident risks.

5. Countries have certain requirements for the thickness of the inner core, but they are not very strict. But there won't be a lot of errors, just a very small error that can't be seen with the naked eye.

6. For length, the state does not force the rice to be beaten, but many manufacturers also beat the rice. The rice that is beaten does not necessarily meet the national standard, but the general national standard generally does not beat the rice. Non-standard rice is just a means.

7. The state stipulates that the wire must be marked with a certain mark. The maximum length shall not exceed 500mm, and the next identical mark will be printed. It usually has the product's trademark, manufacturer name, implementation standards, etc.

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