How to Identify Inferior Building Security Cable?

From the surface you can see pressure inside net regular "roughness", shows good processing technology, it won't produce the relative sliding, is good building security cable; Appearance is smooth, can not see compaction net "roughness", if knead sheathed have loose feeling with the hand, it is a bad cable.

Check the shielding layer braid net: if the braiding quantity is nough, copper braiding net, check the weldability, Tinned Copper wire, scrape to see if it is copper wire, the hardness of aluminum magnesium alloy wire is bigger than that of copper wire; braiding net is sparse, uneven distribution, and package not tight with cable insulation, it will be bad cable.

Check conductor: diameter - SYV cable of 0.78 - 0.8mm, SYWV cable 1.0mm; Recently there is a SYV75-5 conductor cable of 1.0mm diameter, the characteristic impedance of the cable will be certainly not 75ohms, should not applied to the transmission system of 75ohms.

Check the adhesion force of conductor and insulation layer: oblique incision insulating layer, according to the direction of stripping away conductor, the conductor and insulation layer have bonding process materials; Good wire cable has bigger adhesion force, poor cable without sticking.

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Purchase Knowledge of Home Application Wire and Cable

Wire surface marks according to the national standard, there should be factory name, product model and continuous symbol of rated voltage on the wire surface. This is good to use the electric wire when problems occur in the process, you can find the manufacturing factory in time, it is important for consumers to note this when choose and buy wire. At the same time, when purchase wire, consumers should pay attention to if the indicated on the certificate of manufacturer name, product model, rated voltage are consistent with printing marks on the surface of the wire, to prevent counterfeit products.

Wire appearance consumers should pay attention to the appearance of the wire when purchase wire, it should be smooth level off, the insulation and sheath layer without damage, logo printing is clear, no greasy feeling when touch the wire. See from the cross section of the wire, the entire circumference of the thickness of the insulation or sheath of the wire should be uniform, should not be partial core, the insulation or sheath should have a certain of thickness.

Conductor wire diameter consumers should pay attention if the conductor nm-b wire diameter consistent with certificate on express section when purchase wire. If the conductor cross section is small, it will be easy to make the wire hot and cause short circuit. We suggest family lighting wire use 1.5mm2 and above specification; Larger power household electrical appliances like air conditioners, microwave ovens should use wire with power of 2.5mm2 and above specifications.

Specification using the wiring should be regulated, fixed line had better use BV single core tube, attention in wiring, don't touch the wire, in the room don't touch bad when decorate wire; Don't joint in the middle route; Wires connected to the electrical box don't touch the line; Additional power consumption large household appliances such as air conditioning should separate all the wire power supply; Keep a certain distance between low voltage and high voltage cable wires.

What is the difference between the silicone and rubber?

Silica gel is a kind of silicone rubber, belongs to the one-component room temperature vulcanization of liquid rubber.Once exposed to the air, the silane monomer condensation occur, which form a network structure, system of crosslinking, not melting and dissolving, elastic, state into rubber, adhesive objects at the same time. The thermal conductivity was a little higher than general rubber, once cured, it is difficult to separate the object of glue.
High elastic rubber polymer compounds. Including without vulcanization and has the variety of sulfide.Can be divided into two categories, natural and synthetic rubber. Natural rubber latex which rubber plant from the processed.

Synthetic rubber was prepared by monomer polymerization or polycondensation. Without vulcanization rubber commonly known as raw rubber or rubber. Has been vulcanized rubber as the vulcanized rubber, commonly known as vulcanized rubber or rubber.Widely used in the manufacture of tires, rubber hose, adhesive tape, insulation materials, rubber shoes, and other rubber products, etc. Silica gel caps are mainly made by the advanced silica gel, feel is relatively soft, stretch force is strong, and very durable.

Anytekabel Co.,Ltd offers an extensive range of flexible cable, control cable, Armoured Cable, Power Cable approved to International certifications,such as UL,CSA,CE,TUV,VDE,SAA. We keep the customer's demand as our guide, and our target is to be a high-tech enterprises with R & D, production, sales and service.

Anyte THHN cable UL/CSA Certification

TW — Indicates a single conductor having flame-retardant, moisture-resistant thermoplastic insulation. The wire is rated 60°C wet or dry.

THHN cable — Indicates a single conductor having flame-retardant and heat-resistant thermoplastic insulation with a jacket of extruded nylon or equivalent material. The wire is rated 90°C dry only.

THW — Indicates a single conductor having flame-retardant, moisture- and heat-resistant thermoplastic insulation. The wire is rated 75°C wet or dry.

THW-2 — Same as THW except that the wire is rated 90°C wet or dry.

THHW — Indicates a single conductor having flame-retardant, moisture- and heat-resistant thermoplastic insulation. The wire is rated 90°C dry and 75°C wet.

THWN — Indicates a single conductor having flame-retardant, moisture- and heat-resistant thermoplastic insulation with a jacket of extruded nylon or equivalent material. The wire is rated 75°C wet or dry. THWN wire suitable for exposure to mineral oil and to liquid gasoline and gasoline vapors at ordinary ambient temperature is marked "Gasoline and Oil Resistant I" if suitable for exposure to mineral oil at 60°C, or "Gasoline and Oil Resistant II" if the compound is suitable for exposure to mineral oil at 75°C. Gasoline resistant wire has been tested at 23°C when immersed in gasoline. It is considered inherently resistant to gasoline vapors within the limits of the temperature rating.

THWN-2 — Same as THWN except that the wire is rated 90°C wet or dry.

Anytekabel Co.,Ltd.

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Accidents hidden danger of Cable construction is much more in winter

Low medium voltage power cable construction in winter, due to the outdoor temperature are below minus 10 ℃, low temperature of polyvinyl chloride and cross-linked polyethylene insulation and sheath material should suit to present hard brittle features, such as laying accidentally suffers accident knock against, in the process of insulation wire core and copper shield is easily damaged. Even after the cable laying the scene completion test can pass, but later after continuous electricity, cable in the damaged area through the capacitive current eventually, can lead to partial discharge, accelerate the insulation aging, lead to breakdown fault line.

This kind of situation in the low voltage cable performance is not outstanding, performed very well in the medium voltage cable. Sometimes cable factory test without any problems, laying the site due to the limitation of various conditions on cable directly without taking any measures in winter construction, cable laying completed after the scene test everything is normal, but later came a very short time, the power failure, anatomic failure point, appearance without any mechanical damage, but the internal insulation happens serious breakdown and ablation.

Anyte cable

In recent years, some new installation of medium voltage 10kv, 35kv cable fault due to various constraints, not at the scene to cable heating measures, directly around 10 ℃ below zero in winter construction installation on site. The power cable in a short time and white and relatively insulation breakdown fault, by accident, cable production and factory test did not appear abnormal, the scene completion test also smoothly. But electrify malfunction in short time, with no doubt this wire and cable to cable heating measures in winter construction is not relevant.

Introduction of Cable Insulation material

What is the insulation material?
Electrical insulating materials according to their chemical properties of commonly used is different, can be divided into inorganic insulation material and mixed organic insulation materials, insulation materials.Common inorganic insulation material has: mica, asbestos, marble, porcelain, glass, sulfur, etc., mainly used for windings of motors, electrical insulation, switch backplane and insulator, etc.Organic insulating materials are: lac, resin, rubber, cotton, paper, jute, rayon, etc., mostly to cable manufacturing insulating paint, coating insulation of winding wire, etc.Hybrid insulation materials for the above two kinds of material processed into a variety of molding insulation materials, used as the base of the electrical appliances, shell, etc.
The application of insulating material
The role of the insulating material is charged part of the electric cable potential difference in the electrical equipment.Therefore should first insulating material has high insulation resistance and compression strength, and can avoid leakage and breakdown, accident.Second heat resistant performance is better, avoid long-term overheating and aging metamorphism;In addition, still should have good thermal conductivity, tide lightning resistance and high mechanical strength and easy processing, etc.According to the above requirements, the commonly used performance of the insulation dielectric strength, tensile strength, density, coefficient of expansion, etc.