1.1 释义 — 本规程定义了通用航空飞机电气系统和安装的设计、改造和认证的可接受规程和过程。本惯例不会更改或创建任何其他监管要求，也不会授权更改或允许偏离现有监管要求。 1.2 适用性 — 本规程中提供的指南适用于航空公司、航空运营商、设计批准持有人、补充型式证书（STC）持有人、维护供应商、维修站以及执行现场批准修改或维修的任何人。 1.3 保护和注意事项 — 本规程为制定措施和警告声明提供了指导，这些措施和警告声明将添加到维护说明中，以保护电线和电线配置。 维修人员在飞机上工作时，将使用这些增强的程序，以尽量减少对电线互连系统（EWIS）的污染和意外损坏。 1.4 “ 随时随地保护和清洁 ” 哲学 — 该原理通过包含在操作员中应用于飞机布线 ’ 维护和培训计划。这一理念强调了在线束和连接器上或周围工作时采取保护措施的重要性。它强调了在结构维修、STC安装或其他改造期间，通过确保清除此类工作产生的金属屑、碎片和污染来保护EWI的重要性。 1.5本规程包括以下章节: 标题 部分 导线选择 5. 全体的 5.1 飞机导线材料 5.2 可接受导线表 5.3 严重的风和湿度问题（沼泽） 5.4 接地和连接 5.5 电气接线图 5.6 电线电缆标识 6. 全体的 6.1 电线电缆标识 6.2 标记类型 6.3 套管和电缆标记选择 6.4 标识标记的放置 6.5 接线安装 7. 全体的 7.1 线束安装 7.2 电源馈线 7.3 服务环路 7.4 滴水环 7.5 焊接 7.6 应变消除 7.7 接地和连接 7.8 拼接 7.9 燃油箱接线 7.10 防腐化合物（CPC） （MIL-C-81309） 7.11 电力负荷注意事项 8. 全体的 8.1 确定载流的方法 导线容量 8.2 可接受的监测手段和 控制电力负荷 8.3 电气系统部件 9 全体的 9.1 交流发电机 9.2 发电机 9.3 地面电源装置 9.4 辅助动力装置 9.5 电池 9.6 电路保护装置 9.7 管道 9.8 连接器 9.9 逆变器和功率转换器 9.10 交叉点 9.11 接线盒 9.12 电子组件 9.13 继电器 9.14 双头螺栓 9.15 开关 9.16 端子和接线板 9.17 波导 9.18 电气系统部件安装 10 全体的 10.1 交流发电机 10.2 发电机 10.3 辅助动力装置（APU） 10.4 电池 10.5 电路保护装置 10.6 管道 10.7 连接器 10.8 逆变器和功率转换器 10.9 交叉点 10.10 接线盒、面板、屏蔽和 微动开关外壳 10.11 PC板组件 10.12 继电器 10.13 双头螺栓 10.14 开关 10.15 端子和接线板 10.16 波导 10.17 电磁干扰/射频干扰 11 全体的 11.1 接地和连接 11.2 HIRF公司 11.3 闪电 11.4 变更 12 全体的 12.1 导线替换 12.2 商用现货（COTS）组件 12.3 电力负荷注意事项 12.4 电池 12.5 断路器 12.6 接线盒 12.7 继电器 12.8 开关 12.9 导线标记 12.10 线束布线 12.11 线束梳理 12.12 干扰测试 12.13 系统安全评估 12.14 认证过程 13 全体的 13.1 证明 13.2 改造和维护 13.3 1.6 价值观 — 以英寸-磅为单位的数值应视为标准值。括号中的值仅供参考。 基于SI的前缀和10的幂见附录X2。 笔记 1-如果需要国际单位制，请参阅国际民航组织附件5。 1.7 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前制定适当的安全和健康实践，并确定监管限制的适用性。 ====意义和用途====== 设计 — 本规程中定义的设计程序旨在为电气系统的原始设计提供可接受的指导。 变更 — 本实施规程中定义的改装程序旨在为通用航空飞机的改装提供可接受的指导。任何修改的设计应遵循本规范设计章节中规定的实践和流程。 证明 — 本规程中提供的认证指南旨在提供公认的程序和流程，用于认证原始和改进的电气系统和设备。认证要求应与适用的美国国家航空协会/民用航空局（NAA/CAA）监管机构协调。

1.1 Definition — This practice defines acceptable practices and processes for the design, alteration, and certification of electric systems and installations in general aviation aircraft. This practice does not change or create any additional regulatory requirements nor does it authorize changes in or permit deviations from existing regulatory requirements. 1.2 Applicability — The guidance provided in this practice is directed to air carriers, air operators, design approval holders, Supplemental Type Certificate (STC) holders, maintenance providers, repair stations, and anyone performing field approval modifications or repairs. 1.3 Protections and Cautions — This practice provides guidance for developing actions and cautionary statements to be added to maintenance instructions for the protection of wire and wire configurations. Maintenance personnel will use these enhanced procedures to minimize contamination and accidental damage to electrical wiring interconnection system (EWIS) while working on aircraft. 1.4 “ Protect and Clean As You Go ” Philosophy — This philosophy is applied to aircraft wiring through inclusion in operators ’ maintenance and training programs. This philosophy stresses the importance of protective measures when working on or around wire bundles and connectors. It stresses how important it is to protect EWIS during structural repairs, STC installations, or other alterations by making sure that metal shavings, debris, and contamination resulting from such work are removed. 1.5 This practice includes the following sections: Title Section Wire Selection 5 General 5.1 Aircraft Wire Materials 5.2 Table of Acceptable Wires 5.3 Severe Wind and Moisture Problems (SWAMP) 5.4 Grounding and Bonding 5.5 Electrical Wire Chart 5.6 Wire and Cable Identification 6 General 6.1 Wire and Cable Identification 6.2 Types of Markings 6.3 Sleeve and Cable Marker Selection 6.4 Placement of Identification Markings 6.5 Wiring Installation 7 General 7.1 Wire Harness Installation 7.2 Power Feeders 7.3 Service Loops 7.4 Drip Loops 7.5 Soldering 7.6 Strain Relief 7.7 Grounding and Bonding 7.8 Splicing 7.9 Fuel Tank Wiring 7.10 Corrosion Preventative Compounds (CPC) (MIL-C-81309) 7.11 Electrical Load Considerations 8 General 8.1 Methods for Determining the Current-Carrying Capacity of Wires 8.2 Acceptable Means of Monitoring and Controlling the Electrical Load 8.3 Electrical System Components 9 General 9.1 Alternators 9.2 Generators 9.3 Ground Power Units 9.4 Auxiliary Power Units 9.5 Batteries 9.6 Circuit Protection Devices 9.7 Conduit 9.8 Connectors 9.9 Inverters and Power Converters 9.10 Junctions 9.11 Junction Boxes 9.12 Electronic Assemblies 9.13 Relays 9.14 Studs 9.15 Switches 9.16 Terminals and Terminal Blocks 9.17 Waveguides 9.18 Electrical System Component Installation 10 General 10.1 Alternators 10.2 Generators 10.3 Auxiliary Power Units (APUs) 10.4 Batteries 10.5 Circuit Protection Devices 10.6 Conduit 10.7 Connectors 10.8 Inverters and Power Converters 10.9 Junctions 10.10 Junction Boxes, Panels, Shields, and Microswitch Housings 10.11 PC Board Assemblies 10.12 Relays 10.13 Studs 10.14 Switches 10.15 Terminals and Terminal Blocks 10.16 Waveguides 10.17 EMI/RFI 11 General 11.1 Grounding and Bonding 11.2 HIRF 11.3 Lightning 11.4 Alterations 12 General 12.1 Wire Substitutions 12.2 Commercial Off-the-Shelf (COTS) Components 12.3 Electrical Load Considerations 12.4 Batteries 12.5 Circuit Breakers 12.6 Junction Boxes 12.7 Relays 12.8 Switches 12.9 Wire Marking 12.10 Wire Bundle Routing 12.11 Wire Bundle Combing 12.12 Interference Tests 12.13 System Safety Assessments 12.14 Certification Processes 13 General 13.1 Certification 13.2 Alterations and Maintenance 13.3 1.6 Values — The values given in inch-pound units are to be regarded as the standard. The values in parentheses are for information only. See Appendix X2 for SI-based prefixes and powers of 10. Note 1—Where SI units are required, refer to Annex 5 of ICAO. 1.7 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 and health practices and determine the applicability of regulatory limitations prior to use. ====== Significance And Use ====== Design — The design procedures defined in this practice are intended to provide acceptable guidance in the original design of electrical systems. Alteration — The alteration procedures defined in this practice are intended to provide acceptable guidance for modification of general aviation aircraft. Design of any modification shall follow the practices and processes defined in the design sections of this practice. Certification — Certification guidance provided in this practice is intended to provide generally accepted procedures and processes for certification of original and modified electrical systems and equipment. Requirements for certification shall be coordinated with the applicable National Aeronautics Association/Civil Aeronautics Administration (NAA/CAA) regulatory agency.