Matters needing attention in the purchase of wire and cable
To view the inspection report:Wire and cableAs a product that will affect personal and property safety, it has been listed as the focus of supervision and inspection. Power cable manufacturers will regularly accept inspections by supervision departments. Therefore, the seller should be able to provide the inspection report of the quality inspection department, otherwise, the quality of wire and cable products is lack of basis.
Look at the packaging: all formal enterprises that produce products that meet national standards should pay attention to theirWire and cableof packaging. When buying, please pay attention to the exquisite packaging, clear printing, complete model specifications, factory name and factory address.
Look at the appearance: product appearance smooth and round, uniform color. Wire and cable companies whose products meet the requirements of national standards strictly control the procurement of raw materials, production equipment and production processes to improve product quality and ensure that products meet national standards. Therefore, the appearance of the produced wire and cable products meets the standard requirements, smooth, round, and even color. The appearance of fake and inferior products is rough and dull. For rubber-insulated flexible cables, they are required to have a round appearance, a tight sheath, an insulating layer and a conductor that is not easy to peel off. Fake wires and cables are fake and inferior products with rough appearance, large ovality, and low insulation strength of the sheath, which can be torn by hand.
Look at the conductor: the conductor is shiny, and the DC resistance and conductor structure size meet the requirements of national standards. Wire and cable products for electrical equipment that meet the requirements of national standards, whether they are aluminum conductors or copper conductors, are relatively bright and oil-free, so the DC resistance of the conductors is fully in line with national standards, with good conductivity and high safety.
Power cable manufacturersTell you, measure the length of wires and cables;Wire and cable for electrical equipmentLength is the main intuitive way to distinguish between products that meet national standards and fake and shoddy products. When buying, do not covet cheap, buy the actual number of meters lower than its nominal meters of wire and cable. Yanggu cable length needs to meet the standard.
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.