电缆的型号组成与顺序如下：类别、用途，导体，绝缘，内护层，结构特征，外护层，使用特征。
例如：YJY23电缆：
YJ：表示交联聚乙烯绝缘;
Y：表示聚乙烯护套;
2：表示钢带铠装;
3：表示聚乙烯外护套在钢带外。
因此，YJY23是铜芯交联聚乙烯绝缘聚乙烯护套钢带铠装聚乙烯外护套电力电缆。
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