Classification of traverse
Classification of traverse
Single and multiple strands are divided according to the number of shares : 6mm in general?And the following is a single strand;the section area of 10mm'is more than one strand,and several strands or dozens of strands are twisted together to form a root, which has 7 shares,19 shares,37 shares and so on.
According to the material, there are single wire ( such as copper wire, aluminum wire ), bimetallic wire ( such as silver-plated copper wire ) and alloy wire.
There are bare wires and insulated wires with or without insulation.
According to the thickness of the wire, the standard is called wire gauge,wire number and wire diameter.According to the thickness of the wire arranged into a certain number of called line number system,the larger the line number,the smaller the diameter of the line; the wire diameter is expressed in millimeters of the diameter of the wire.Britain and the United States and other countries adopt the line number system,and China adopts the line diameter system.
B series of rubber plastic wire B series of wire structure is simple,electrical and mechanical performance is good,widely used as power,for lighting and installation of large and medium-sized electrical equipment,the AC operating voltage is less than 500V. The core of R series soft wire of R series is made of fine copper wire,which has the characteristics of B series wires,it is also relatively soft,widely used in household appliances,small electrical equipment,instrumentation and lighting lines.
Y series of general rubber cable Y series cables are commonly used in mobile tools such as electrical equipment,power tools,etc.Third,the identification of commonly used electrical insulation materials,usually in electrical technology,the resistance coefficient is greater than 1X10 "
Cm " material is called insulation material material.
Wire connection and insulation recovery practice wire connection basic requirements are : electrical contact is good, mechanical strength is enough,the joint is beautiful,and the insulation is back to normal.Common wire connection method:wire connection process is first stripping and then connecting.The stripping and cutting methods of the insulation layer of wire head are shown in Table.