On December 26, 2015, "Bing Hua Hua Electric" pushed a short article on "Scientific and Reasonable use of 70-year life cable", which attracted the attention and consultation of some readers. Today, from personal understanding, the use principle of 70-year life wire and cable is explained:

1. The promulgation of product standards has laid the application foundation for the use of 70-year life cables and wires

The industry standard JG/T 442-2014 of Double-layer coextruded insulation radiation cross-linked halogen-free low-smoke flame retardant cable with rated voltage 0.6/1 kV and JG/T 441-2014 of double-layer coextruded insulation radiation cross-linked halogen-free low-smoke flame retardant wire with rated voltage 450/750V and below were implemented on February 1, 2015. There will be laws for product manufacturing, testing, testing, etc. In theory, the wire and cable life of 70 years will have a standard guarantee, and the wire and cable life will be extended by 2 to 3 times.

2, 70 years of wire and cable use principles

1) The life of the wire and cable must match the design service life of the building

If the design life of the building is only 50 years, it is obvious that the use of 70-year life of wire and cable is not appropriate, which will cause waste of materials and investment is unreasonable.

2) The life of the wire and cable must match the life of the equipment that supplies it

General electromechanical equipment life is only ten or twenty years, if the power supply wire and cable is 70 years of life, it will also cause unnecessary waste, wire and cable use is unreasonable.

3) The life of the wire and cable must match the cycle of the second decoration

Civil buildings, especially like commercial, hotel and other formats will be redecorated after more than ten years of use, the use of ordinary life of cable and wire can meet the requirements, there is no need to spend 20% to 30% more cost of using long-life wire and cable.

4) The life of the wire and cable must match the cycle of the business transformation

Normal building design life is divided into 50 years, 70 years, and if the business changes during the life cycle of the building, the use of 70-year life wire and cable is not appropriate.

5) The last level of power distribution in civil buildings should not use long-life cables and wires

In civil buildings, the last level of power distribution is often related to decoration and building functions. After a few years, the probability of reclassifying the building function and redecorating is higher, and the use of ordinary life cables and wires can meet the requirements, and the economy is more reasonable.

3, the following situations should use 70 years of life of cable and wire

1) Lighting or power mains for civil buildings with a design life of 70 years or more;

2) Other places suitable for 70-year cable and wire life.

As the 70-year life of wire and cable is a new product, there is no application experience. The above is personal experience, for reference only!


Qingdao Tianxing Cable Co., Ltd. is a technology enterprise specializing in the production of wire and cable in Shandong Province, with more than 150 sets of domestic excellent cable production equipment and testing equipment, excellent production technology, modern testing equipment, to ensure stable product quality and timely supply. The company's main products are power cable, mineral cable, high life wire and cable, radiation crosslinked cable, control cable, computer cable, photovoltaic cable, communication cable, data cable, low smoke halogen free cable, flame retardant series wire and cable.

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