This specification covers standard requirements for bare-concentric-lay stranded conductors made from round copper wires, either uncoated or coated with tin, lead, or lead alloy for general use for electrical purposes. These conductors shall be constructed with a central core surrounded by one or more layers of helically laid wires. The conductors shall be classified as follows: Class AA, Class A, Class B, Class C, and Class D. Sizes, number of wires, and diameter of wires in the various classes of concentric-lay-stranded conductors shall conform to the prescribed requirements. Welds and brazes may be made in rods or in wires prior to final drawing. The completed conductor of varying classes shall conform to the minimum distance required between the joints. Diameters, areas, and mass of concentric-lay-stranded copper conductors shall conform to the prescribed requirements. Physical and electrical tests of conductors stranded of hard-drawn or medium-hard-drawn wires shall be conducted before but not after stranding. The approximate mass and electrical resistance may be determined using the required increments. The material shall also conform to the temperature corrections factor for conductor resistance.1.1 This specification covers bare concentric-lay-stranded conductors made from round copper wires, either uncoated or coated with tin, lead, or lead alloy for general use for electrical purposes. These conductors shall be constructed with a central core surrounded by one or more layers of helically laid wires.NOTE 1: This specification also permits conductors for use as covered or insulated electrical conductors.NOTE 2: Sealed conductors, that are intended to prevent longitudinal water propagation and are further covered/insulated, are also permitted within the guidelines of this specification.1.2 For the purposes of this specification, conductors are classified as follows (Explanatory Note 1 and Note 2):1.2.1 Class AA—For bare conductors usually used in overhead lines.1.2.2 Class A—For conductors to be covered with weather-resistant (weather-proof), slow-burning materials, and for bare conductors where greater flexibility than is afforded by Class AA is required.1.2.3 Class B—For conductors to be insulated with various materials such as rubber, paper, varnished cloth, and so forth, and for the conductors indicated under Class A where greater flexibility is required.1.2.4 Class C and Class D—For conductors where greater flexibility is required than is provided by Class B conductors.1.3 The SI values for density are regarded as the standard. For all other properties, the inch-pound values are to be regarded as standard and the SI units may be approximate.1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

定价： 590元 / 折扣价： 502 元 加购物车

This specification covers tinned hard-drawn and medium-hard-drawn round copper wire for electrical properties. The tinned wire shall be made by coating hard-drawn and medium-hard-drawn copper wire with commercially pure tin. The copper shall be of such quality and purity that the finished product shall have the properties and characteristics prescribed in this specification. The tin coating shall consist of a smooth continuous layer, firmly adhering to the surface of the copper. The wire shall be free from all imperfections not consistent with the best commercial practice. The tinned wire shall conform to the requirements as to the tensile properties prescribed. Tension tests shall be made on representative samples. The elongation of the wire shall be determined as the permanent increase in length due to the breaking of the wire in tension, measured between gage marks. Electrical resistivity shall be determined by resistance measurements made in accordance with the test method prescribed in this specification. The continuity of coating on the wire shall be determined by the sodium polysulfide test. The specimens shall be thoroughly cleaned by immersion in a suitable solvent for the appropriate time required to remove oil or grease from surface; then removed and wiped dry with clean, soft cloth. Mechanical test for adhesion of coating shall be performed. Any cracking or parting of the coating in the area shown by blackening of the copper shall be cause for rejection.1.1 This specification covers tinned hard-drawn and medium-hard-drawn round copper wire for electrical purposes.1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.1.2.1 Exception—For density, resistivity and temperature, the values stated in SI units are to be regarded as standard.1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. For hazard statement, see Sections 10 and 13.1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

定价： 590元 / 折扣价： 502 元 加购物车