What are the roles of wires and cables in social development?

U wires and cables are everywhere; Wire and cable are the blood vessels of industry, the nerves of society, and the heart of motors; The 21st century will be the world of wires and cables. 1. Transmission of electrical energy through cables; 2. Crane cables; 3. Electric wires and cables used in engineering; 4. Electric motor cables; 5. Residential power cables; 6. Control cable for the unit

How to choose the cross-section of wires and cables?

The selection of wire and cable cross-section should meet the requirements of allowable temperature rise, voltage loss, mechanical strength, etc. 1. Select cross-section based on temperature rise: To ensure that the actual working temperature of wires and cables does not exceed the allowable value, the allowable long-term working current of wires and cables is based on the heating conditions (hereinafter referred to as "the allowable long-term working current"). The carrying capacity should not be less than the working current of the line; 2. Cross section verification based on economic current density: Choosing an economic cross section can be determined based on the principle of minimizing annual expenses, with annual fees. The expenditure calculation formula is: B=0.11Z+1.11N, where Z is the investment; The operating cost for one year, including electricity loss fees, depreciation fees, etc., is calculated based on a service life of 25 years.