What are the classification of wires and cables for electrical equipment?
Electrical equipment with wire and cable is a large class of wire and cable products, a wide range of applications, many varieties, many series, large output, process type complex. The rated voltage of wires and cables for electrical equipment is low, and the working voltage is 450/750v and below, which is not more than 0.6/1kv. The working voltage of signal and instrument cables is usually 300/500v and below. The ampacity of the cable is determined according to the requirements of the cable. There are many kinds of insulation materials and sheath materials used in cables, and their performance indicators are also different.
Wire and cable for electrical equipment is widely used and has strong applicability. They can be divided into strong and weak electricity, generally can not be universal. It is suitable for power plants, chemical industry, tunnels, stations, high-rise buildings and other fire-fighting systems with high requirements. It is especially suitable for the power supply lines of emergency power supply and indoor fire-fighting equipment, the power supply lines from emergency power supply to signal lights, and the power supply lines from emergency power supply to ventilation and smoke exhaust equipment.
Classification of wires and cables for electrical equipment:
1, low-voltage distribution wire and cable: mainly refers to the fixed laying and mobile power supply wire and cable. Such as general rubber insulated wire, rubber insulated flexible wire, shielded insulated wire, rubber flexible cable, etc.
2, signal and control cable: mainly refers to the control center and the system between the transmission signal or control operation of the wire and cable. Such as the control cable composed of various insulating materials and sheaths, the control cable of the safety circuit, the control cable of the low smoke halogen-free electronic computer, etc.
3. Instrument and equipment connection line: mainly refers to the internal installation line and external lead of instrument and equipment. For example, the installation and wiring cables of ie K3 grade instruments for nuclear power plants, flexible cables for signals and power equipment for water conservancy engineering observation, wires and cables for flame-retardant instruments, fluorine-insulated computer cables, etc.
4, transport wire and cable: mainly refers to supporting vehicles, locomotives, ships, aircraft and other wires and cables, such as road vehicle insulation lines, aviation wires, ship cables, rolling stock cables, elevator cables.
5, geological resources exploration and development of wires and cables: mainly refers to coal, ore, oil field exploration and development of wires and cables. Such as: oil platform cable, geological exploration cable, coal mine flame retardant cable, mining wire and cable, etc.
6. DC high voltage cable: mainly refers to the wire and cable matched with X-ray machine and electrostatic equipment. Such as: photographic light source cable, DC high voltage flexible cable, high voltage electric furnace cable, electron microscope high voltage cable, etc.
7, special wire and cable: mainly refers to the high temperature, fire, nuclear power plants and other wires and cables, such as nuclear power plant cables, fluorine plastic or silicone rubber.
8. Heating cable: mainly refers to wires and cables used for household heating, plant cultivation, pipeline insulation, etc., such as automatic temperature control heating cables, mineral insulated heating cables, etc.
What are the main points of purchasing wires and cables? Let's take a look. As the main carrier of power transmission, wire and cable are widely used in electrical equipment, lighting circuits, household appliances, etc. Its quality directly affects the quality of the project and the safety of consumers' lives and property. There are many wire varieties on the market, and appropriate wires should be used according to their own power load.
What are the precautions for wires and cables? Let's take a look. Common cable faults: wire surface markings-according to national standards, the wire surface should have continuous markings of the manufacturer's name, product model and rated voltage. This helps to find the manufacturing plant in time when there is a problem during the use of the wire, and consumers should pay attention to this when buying the wire.
There are many kinds of wire and cable products for electrical equipment on the market, which are difficult for ordinary consumers to distinguish. So what are the main categories of wire and cable products? What are the product naming principles of wire and cable? The editor brings you a brief understanding of relevant content knowledge.
The wires and cables for electrical equipment are mainly used for internal or external connection of electrical equipment, low-voltage transmission lines and various electrical signal transmission lines. Generally speaking, except for power cables, communication cables and magnet wires, most insulated wires and cables are classified as wires and cables for electrical equipment.
Electrical equipment with wire and cable is a large class of wire and cable products, a wide range of applications, many varieties, many series, large output, process type complex. The rated voltage of wires and cables for electrical equipment is low, and the working voltage is 450/750v and below, which is not more than 0.6/1kv. The working voltage of signal and instrument cables is usually 300/500v and below. The ampacity of the cable is determined according to the requirements of the cable.
Low voltage power cable winter pay attention to matters? As the weather gets colder and colder, manufacturers of low-voltage power cables usually become more difficult, which brings inconvenience to construction. Here are some precautions for winter construction. Let us take a brief look.