1.1 本规程旨在为造船商、船东和设计代理提供指南，用于选择单导线或多导线电缆的导线尺寸，无论是美国线规（AWG）还是商用船舶设计和建造的公制名称。 1.2 导线尺寸对比图如所示 表1 根据AWG B级绞合（规范），给出了绞合无涂层（普通）铜导线的组合列表 B8 )英寸磅单位或国际标准尺寸的2级IEC（规范IEC 60228）公制单位。 1.3 作为预防性警告，一些导线尺寸列于 表1 可能超过美国海岸警卫队、美国航运局和IEEE STD 45对特定应用的最小尺寸要求。 1.4 载流量和直流电阻的规定值为最大值，仅供参考。 1. 5. 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。 ====意义和用途====== 3.1 选择标准适用于( 1. )新电缆和( 2. )更换电缆。 3.2 对于新电缆的选择或替换电缆的选择，本规程定义了AWG（ASTM）或公制（IEC）尺寸电缆导体选择的选择标准。

1.1 This practice is intended as a guide to shipbuilders, shipowners, and design agents for use in the selection of conductor size for single conductor or multiple conductor cable sizes either in American Wire Gauge (AWG) or metric designations for commercial ship design and construction. 1.2 The comparison chart of electrical conductor sizes shown in Table 1 presents a combined listing of stranded uncoated (plain) copper conductors in accordance with AWG Class B stranding (Specification B8 ) inch-pound units or international standard sizes of Class 2 IEC (Specification IEC 60228) metric units. 1.3 As a precautionary caveat, some conductor sizes listed in Table 1 may exceed minimal size requirements of the U.S. Coast Guard, the American Bureau of Shipping, and IEEE STD 45 for specific applications. 1.4 The values stated for ampacity and dc resistance are presented as maximum values and are provided for information only. 1.5 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. ====== Significance And Use ====== 3.1 The selection criteria is to be applied for uses of ( 1 ) new cable and ( 2 ) replacement cable. 3.2 For the selection of new cable or the selection of replacement cable, this practice defines the choice criteria for conductor selection for cables in AWG (ASTM) or metric (IEC) sizes.