定义1：由一根或多根相互绝缘的导体和外包绝缘保护层制成，将电力或信息从一处传输到另一处的导线。
定义2：通常是由几根或几组导线（每组至少两根）绞合而成的类似绳索的电缆，每组导线之间相互绝缘，并常围绕着一根中心扭成，整个外面包有高度绝缘的覆盖层。电缆具有内通电，外绝缘的特征。
分类
电缆有电力电缆、控制电缆、补偿电缆、屏蔽电缆、高温电缆、计算机电缆、信号电缆、同轴电缆、耐火电缆、船用电缆、矿用电缆、铝合金电缆等等。它们都是由单股或多股导线和绝缘层组成，用来连接电路、电器等。
电缆按照光伏电站的系统可分为直流电缆及交流电缆，根据用途及使用环境的不同分类如下：
1.直流电缆
(1)组件与组件之间的串联电缆。
(2)组串之间及其组串至直流配电箱(汇流箱)之间的并联电缆。
(3)直流配电箱至逆变器之间电缆。
以上电缆均为直流电缆，户外敷设较多，需防潮、防暴晒、耐寒、耐热、抗紫外线，某些特殊的环境下还需防酸碱等化学物质。
2.交流电缆
(1)逆变器至升压变压器的连接电缆。
(2)升压变压器至配电装置的连接电缆。
(3)配电装置至电网或用户的连接电缆。
此部分电缆为交流负荷电缆，户内环境敷设较多，可按照一般电力电缆选型要求选择。
型号
组成与顺序
电线电缆的型号组成与顺序如下：[1：类别、用途][2：导体][3：绝缘][4：内护层][5：结构特征][6：外护层或派生]-[7：使用特征]
1-5项和第7项用拼音字母表示，高分子材料用英文名的第一位字母表示，每项可以是1-2个字母；第6项是1-3个数字。
4000093-310
Definition 1: A wire made of one or more mutually insulating conductors and an outer insulating protective layer that transmits power or information from one place to another.
Definition 2: A cord-like cable, usually consisting of several or groups of wires (each group of at least two) twisted together, each group of wires insulated from each other and often twisted around a center, with a highly insulated covering covering the entire outer layer. The cable has the characteristics of internal power and external insulation.
sort
There are power cables, control cables, compensation cables, shielding cables, high temperature cables, computer cables, signal cables, coaxial cables, refractory cables, Marine cables, mining cables, aluminum alloy cables and so on. They are composed of single or multiple strands of wire and insulation layer, used to connect circuits, electrical appliances, etc.
Cable according to the system of photovoltaic power station can be divided into DC cable and AC cable, according to the use and use of the environment is classified as follows:
1. Dc cable
(1) Series cables between components and components.
(2) The parallel cable between the series and the series to the DC distribution box (bus box).
(3) Cable between DC distribution box and inverter.
The above cables are DC cables, outdoor laying more, need to moisture-proof, anti-sun, cold, heat, UV resistance, some special environment also need to prevent acid and alkali and other chemical substances.
2. Ac cable
(1) Connection cable from inverter to booster transformer.
(2) The connection cable between the booster transformer and the distribution device.
(3) The connection cable between the distribution device and the power grid or the user.
This part of the cable is AC load cable, the indoor environment is laid more, can be selected according to the general power cable selection requirements.
Model number
Composition and sequence
The type composition and sequence of wire and cable are as follows: [1: category, use][2: conductor][3: insulation][4: inner cover][5: structural characteristics][6: outer cover or derivative]-[7: use characteristics]
Items 1-5 and 7 are represented by pinyin letters, polymer materials are represented by the first letter of the English name, and each item can be 1-2 letters; The sixth item is 1-3 numbers.
