Wire and cable are indispensable basic equipment for transmitting electrical energy, transmitting information and manufacturing various motors, electrical appl...

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Many people home decoration, casually buy a wire to the street to use, this is wrong. So, how to calculate the thickness of the wire? In general, the copper wire cross-sectional area of ??per square millimeter to allow current through 9 amperes, aluminum wire is 6 amps, this is the limit number, do not use it more than it. So how do we know how much electricity we use at home?

How far away from the high-voltage lines, safety?1 meter away, 2 meters away, or 3 meters away ... do not know if it is really dangerous! Today we take a look at the safe distance of high-voltage lines.

In the purchase of wire and cable, the quality of the cable products is that we need attention, how to get the standard wire and cable it? Wire and cable need to do what test? Here to introduce the common cable test items and testing purposes:

Power cable through a certain load current, it will certainly fever, with the load current increases, the higher the cable surface temperature, if not treated, the consequences can be imagined. Such as polyvinyl chloride (PVC) cable, core temperature is 70 degrees as the upper limit of consideration, the surface temperature will be low 5 to 10 degrees. So the cable surface temperature below 60 degrees is basically safe, from the power maintenance considerations, of course, the lower the temperature the better. Cable in operation due to fever as follows:

Common cable wire specifications and models are:1, copper (aluminum) core PVC insulated PVC sheathed cable insulation and laying with fixed wire: This product is suitable for AC rated voltage U / U450 / 750V and below the power, lighting, household appliances, instruments, and meters Telecommunication equipment with copper or aluminum core PVC insulated cables

Place the head of a battery (positive) against the tail (negative) of the other section in the flashlight, and the flashlight is on: the flashlight is off if it is upside down, head-to-head, or tail-to-tail. This is because the current generated by the battery is always in one direction, so-called DC.

The choice of cable cross-section size should be based on the maximum residential electricity demand and the maximum current carrying wire and cable can be set. People generally calculate the residential electricity consumption, according to the architectural design code is calculated according to the area of ??40-50W per square meter. This is more than 90 meters above the house can be, for 50-60 square meters of residential cannot meet the requirements. Therefore, the home renovation money should first plan all the residential electricity consumption and then select the wire cross-section.

In the choice of cable to choose according to their own site use of the cable, not for the sake of cheaper. For the majority of users to more clearly, understand the quality standards of cable and self-judgment GB and non-standard differences. Here's to give you a brief introduction:

Electricity use and our life is closely related to the production of all walks of life are inseparable from the electricity, electricity cannot be separated from the cable, then the service life of the cable has a direct impact on the safety of production, cable life is induced by the oxidation of the jacket material Period of decision, the general use of cable design 30 years, the actual life is far greater than this value.

35kv and below XLPE insulated power cables for fixed laying in the exchange of 50Hz, rated voltage 35Kv and below the power transmission and distribution lines for power transmission. Compared with the PVC power cable, the product not only has excellent electrical performance, mechanical properties, heat aging resistance, environmental stress resistance and chemical resistance of the ability, and the simple structure, light weight, Long-term high temperature (90 degrees) and so on.

Wire and cable as the main carrier of power transmission, widely used in electrical equipment, lighting circuits, household appliances and other aspects of its quality directly affect the quality of the project and the safety of life and property of consumers. In the market, there are many varieties of wires, according to their own electricity load to use the appropriate wire.

Cross-linked polyethylene insulated PVC sheathed control cable is suitable for distribution equipment with AC rated voltage of 450/750V and below as the connection line of electrical instruments.

What types of commonly used wires and cables are divided by purpose?Answer: According to purpose, it can be divided into bare wire, insulated wire, heat-resistant wire, shielded wire, power cable, control cable, communication cable, and radio frequency cable.

What are the uses of power cables? The basic structure of the cable includes conductive core, the insulation layer, lead package (or aluminum package) and protective layer. The following is a summary of the respective uses of power cables.

Wire and cable include many types of products, the following is to introduce the classification of power cables. By product category:

In the purchase of wire and cable, wire and cable sheathing is also one of the factors to be considered, then the thickness of the wire and cable sheath and cable quality What is the relationship? Next, on this issue, give you a brief introduction: Wire and cable sheath thickness, the quality of wire and cable common impact has the following two aspects:

How to select the conductor and cable? The basic structure of a cable generally consists of the following three parts: Conductive conductor for transmitting electrical energy or signal, insulating layer for guaranteeing that the power or signal is isolated from the outside along the conductive conductor and the power grid voltage

Armored cable refers to the cable with the metal armor protective layer. The purpose of the cable plus armor layer is to prolong the service life of the cable by enhancing mechanical properties such as tensile strength and compressive strength and also to improve the anti-interference performance of the cable through shielding.

Copper and aluminum which is better? Copper and aluminum wire have their own uses as the most commonly used metals in power systems, as well as their respective advantages and disadvantages. Only by clarifying the advantages and disadvantages of both of them and characteristics can be properly drawn, make the best use. Otherwise it is easy to cause improper use, ranging from the line damage, heavy cause fire.

Wire and cable materials,First, polyvinyl chloride (PVC).Second, polyethylene (PE).Third, ethylene - vinyl acetate copolymer (EVA).Fourth, polypropylene (PP).

What are the advantages of environment-friendly cables？Environmental protection cable compared with ordinary cable has the following advantages:First, high flame retardancy, we all know that the flame retardant properties of the cable to ensure fire safety requirements of the cable is very important, the cable is not easy to fire, and can prevent the flame expansion.

Armored cables are made of different material conductors in a metal sleeve with an insulating material and are machined into a bendable solid assembly. Armored cable includes armored thermocouple, armored thermal resistance, armored heater and armored lead, mainly used for temperature measurement, signal transmission and special heating in the chemical industry, metallurgy, machinery manufacturing, power generation and scientific experiment, etc. The armored thermocouple.

It is easy to confuse the concept of flame retardant and fire-retardant cable, although the flame retardant cable has many advantages more suitable for chemical enterprises, such as low halogen, low smoke,and flame retardant, but in general, fireproof cables can replace flame-retardant cable, flame retardant cable and cannot replace the refractory cable.