1.范围1。1本标准涵盖了同心敷设的1350铝合金绞合导线，由一条直圆中心线构成，周围环绕着一层或多层螺旋敷设的圆线。导体回火应为规定的硬质（H19）、中间或退火。导线一般用于电气用途。1.2就本标准而言，导线分类如下:（a）AA级——用于架空线路中常用的裸导线；（b） A级——适用于覆盖有耐候（防风雨）材料的导线，以及要求比AA级具有更大灵活性的裸导线。 与铝或ACSR信使或其周围螺旋状绝缘和敷设的导线应仅在敷设方向上被视为A类导线（见第3.2.2.4条）；（c） B类——用于用各种材料（如热塑性塑料、热固性塑料、纸等）绝缘的导线，以及要求更大柔性的A类导线；（d） C类和d类——适用于要求比B类导线具有更大灵活性的绝缘导线。

1. Scope1.1This Standard covers concentric-lay aluminum alloy 1350 stranded conductors, constructed with a straight round central wire surrounded by one or more layers of helically laid round wires. The conductor temper shall be hard (H19), intermediate, or annealed, as specified. The conductors are for general use f or electrical purposes.1.2For the purposes of this Standard conductors are classified as follows:(a) Class AA - for bare conductors usually used in overhead lines;(b) Class A - for conductors to be covered with weather- resistant (weatherproof) materials, and for bare conductors where greater flexibility than is afforded by Class AA is required. Conductors to be insulated and laid helically with, or around, aluminum or ACSR messengers shall be regarded as Class A conductors with respect to direction of lay only (see Clause 3.2.2.4);(c) Class B - for conductors to be insulated with various materials such as thermoplastics, thermosets, paper, etc., and for the conductors indicated under Class A where greater flexibility is required;(d) Classes C and D - for insulated conductors where greater flexibility is required than is provided for Class B conductors.