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What is the measurement method of cable thickness?

release time:

2021-09-15

What is the measurement method of cable thickness?

As the main carrier of power transmission, wire and cable consist of one or more insulated cores, each of which may have a coating, a total protective layer, and an outer protective layer, and the cable may also have additional conductors without insulation. Most of them are composed together. Because many cables have protective layers, cables can be widely used in electrical equipment, lighting circuits, household appliances, etc. The quality of the cable directly affects the quality of the project and the safety of consumers’ lives and property. However, when people buy cables, because there are many types of cables on the market, there are not only bare wires, but also thicker cables. People don't know whether to choose a thicker cable or a thinner cable. They even think that a thicker cable can withstand a large current. Therefore, the thicker the cable, the better. Is this understanding correct? What does the thickness of the cable have to do with it? How should we measure the thickness of the cable? Next, Sino-Ocean Cable Co., Ltd. will talk to you about the thickness of the cable.

(1) The thickness of the cable is approximately proportional to the size of the current, and the diameter is proportional to the current. That is to say, the thicker the cable, the stronger the current capacity. Take the copper wire as an example. The open-laying current carrying capacity of copper wire (approximate value): 1 square-20A; 1.5 square-25 A; 2.5 square-30A; 4 square-40A; 6 square-50A. Therefore, the thicker the cable is selected, the better its current-carrying performance.

(2) Although the current-carrying capacity of the cable is not directly proportional to the cross-sectional area, 10A needs to be subtracted when laying through the pipe. This shows that the current-carrying capacity is directly related to the heat dissipation of the copper wire, that is, when the current is the same Under the conditions, choose a thin cable. If the current is too large, risks such as overheating, melting, and burning will occur; and the thicker the cable, the better the heat dissipation performance.

(3) The thickness of the cable has no direct relationship with the power consumption. The thicker the wire, the safer it is. If the wire is thinner, the loss of electricity on the wire will be greater, that is, when you use a lot of electricity, the wire will also use electricity. The thinner the wire, the more electricity it costs.

It can be seen from the above that the thicker the cable, the better, but at the same time it also stumps us. How do we measure the thickness of the cable? Can I use a thread nose?

The so-called "cable nose" is a material that can make the connection between cables and electrical appliances stronger and safer, and is often used for cable end connection and connection. Normally, the wire nose is larger than the cable diameter! Therefore, it is not advisable to use the nose to measure the thickness of the cable. The authoritative detection method should be selected-measuring the DC resistance!

Well, the above is about "the thicker the cable, the better" and "how to measure the thickness of the cable" answer, I hope everyone can understand, and then choose the correct detection method to select the cable.