Causes and preventive measures of wire and cable damage in winter

In the cold winter, many construction workers will find that when laying and installing wires and cables, some wire and cable products with good quality at ordinary times often have some phenomena such as hard wire body and damaged insulation sheath, many construction workers think that the wire and cable products themselves have quality problems, and the cable manufacturers also insist that the products have been inspected at the factory and are qualified products, which often leads to misunderstanding between the two sides. In fact, it is not the quality of the product itself, but the cold winter. The skin of wire and cable products is mostly ordinary plastic (PVC) Or rubber, when they are in an environment below zero, they will become hard, and the entire wire and cable product line will become hard and brittle, resulting in the skin may fall off and be damaged under slight external force. In winter, especially in the northern areas, the outdoor temperature is often below zero, and the surface temperature may be lower. Therefore, if the wire and cable products are placed outdoors or directly on the surface, it is likely that the skin of the product will fall off. So, how can we prevent the phenomenon of wire and cable skin falling off in winter? Take the following measures from each stage -? - | 1. Ex-factory transportation: when the product is loaded on the transportation tool, it needs to be kept warm and protected. For example, the use of closed means of transport to prevent direct exposure of products; Give the product a soft cushion, such as bedding or other soft foam; Handle and handle gently when loading, do not load roughly, and avoid excessive bending of products. 2. When arriving at the destination or the construction site, the product supplier had better send personnel to supervise to prevent rough operation when unloading the product. 3. Storage: it is best to store the product indoors, and at the same time, lay a layer of isolation layer on the stored surface, such as wood board, bedding, foam, etc. , to prevent the product from being frozen and damp, pay attention to prevent the product from being scratched by direct contact with the ground, and gently handle it. 4. When laying and installing the product: it is best to choose to work in the afternoon when the temperature is warmer. If conditions permit, use the heater and other equipment to 'warm up' the product in advance before use ', let the product reach the best performance state. If it is buried in the ground, a layer of protective layer, such as cloth and foam, can be laid in the cable trench in advance. If you wear a pipe, you must ensure that the inside and outside of the pipe is smooth in advance so as not to scratch the wire. In particular, iron pipes should be paid attention to. If you choose qualified iron pipes, there may be a large number of sharp convex starting points in the poor quality iron pipes, which are likely to scratch the outer skin of the wires. 5, choose Puguang brand low temperature cable, in strict accordance with the national standard 'GB/T2951. 14- 2008 'the test requires testing, placing it in an environment of minus 35 ℃ for 16 hours, then conducting mechanical performance tests, and repeatedly bending and scratching it, the elongation and tension test of the insulation and sheath are carried out, and the passing rate reaches 100%. Puguang low temperature cable has extremely strong low temperature resistance, which can be used in cold external environment, insulation and sheath epidermis can still ensure no cracks and no fracture. In the cold winter, many construction workers will find that when laying and installing wires and cables, some wire and cable products with good quality at ordinary times often have some phenomena such as hard wire body and damaged insulation sheath, many construction workers think that the wire and cable products themselves have quality problems, and the cable manufacturers also insist that the products have been inspected at the factory and are qualified products, which often leads to misunderstanding between the two sides. In fact, it is not the quality of the product itself, but the cold winter. The skin of wire and cable products is mostly ordinary plastic (PVC) Or rubber, when they are in an environment below zero, they will become hard, and the entire wire and cable product line will become hard and brittle, resulting in the skin may fall off and be damaged under slight external force. In winter, especially in the northern areas, the outdoor temperature is often below zero, and the surface temperature may be lower. Therefore, if the wire and cable products are placed outdoors or directly on the surface, it is likely that the skin of the product will fall off. So, how can we prevent the phenomenon of wire and cable skin falling off in winter? Take the following measures from each stage -? - 1. Ex-factory transportation: when the products are loaded on the means of transportation, warm and protective measures are required. For example, the use of closed means of transport to prevent direct exposure of products; Give the product a soft cushion, such as bedding or other soft foam; Handle and handle gently when loading, do not load roughly, and avoid excessive bending of products. 2. When arriving at the destination or the construction site, the product supplier had better send personnel to supervise to prevent rough operation when unloading the product. 3. Storage: it is best to store the product indoors, and at the same time, lay a layer of isolation layer on the stored surface, such as wood board, bedding, foam, etc. , to prevent the product from being frozen and damp, pay attention to prevent the product from being scratched by direct contact with the ground, and gently handle it. 4. When laying and installing the product: it is best to choose to work in the afternoon when the temperature is warmer. If conditions permit, use the heater and other equipment to 'warm up' the product in advance before use ', let the product reach the best performance state. If it is buried in the ground, a layer of protective layer, such as cloth and foam, can be laid in the cable trench in advance. If you wear a pipe, you must ensure that the inside and outside of the pipe is smooth in advance so as not to scratch the wire. In particular, iron pipes should be paid attention to. If you choose qualified iron pipes, there may be a large number of sharp convex starting points in the poor quality iron pipes, which are likely to scratch the outer skin of the wires. To make a long story short, in winter, wires and cables will become very fragile, and we need to 'take care '.