Components of the wire:

Components of the wire:

The basic structure of the power cable is composed of four parts: the core (conductor), the insulation layer, the shielding layer and the protective layer.

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How to prevent wire and cable from catching fire due to wire overload

How to prevent wire and cable from catching fire due to wire overload

Wire and cable in the process of operation, due to the existence of resistance will heat. The resistance of the wire is generally very small, and its heating power can be expressed by the formula q = I ^ 2R. Q = I ^ 2R indicates that for a section of wire in actual use (R is almost constant), the greater the current through the wire, the greater the heating power; if the amount of current is constant, the heating power of the wire is also constant. The heat released during operation will be absorbed by the wire itself, causing the wire temperature to rise. Although the wire is constantly absorbing the heat released by the current during operation, its temperature will not rise indefinitely. Because the wire absorbs heat, it is also constantly releasing heat to the outside world. Facts show that the temperature gradually rises after the wire is energized, and finally the temperature is constant at a certain point. At this constant point, the wire absorption and exothermic power are consistent, and the wire is in thermal equilibrium. The ability of the conductor to withstand higher temperature operation is limited, and operation beyond a certain maximum temperature can be dangerous. This maximum temperature naturally also corresponds to a certain maximum current, and the wire running beyond this maximum current is overload. Overload of the wire directly causes the temperature of the wire itself and its nearby items to rise. Temperature rise is the most direct cause of this kind of fire.

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difference of wire and cable:

difference of wire and cable:

The cable is much thicker than the wire, the size is different, the wire specification is smaller, the internal structure is simpler, and the cable specification is larger, the internal structure is more complex

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What does the color on the wire and cable mean?

What does the color on the wire and cable mean?

Everyone knows that several wires in the cable have different colors. What are these colors used for? The following is the network editor of Copper Bridge Electric Co., Ltd. to introduce to you what the color on the cable means.

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