Значение и использование

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.

Область применения

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:

TitleSection Wire Selection5 General5.1 Aircraft Wire Materials5.2 Table of Acceptable Wires5.3 Severe Wind and Moisture Problems (SWAMP)5.4 Grounding and Bonding5.5 Electrical Wire Chart5.6 Wire and Cable Identification6 General6.1 Wire and Cable Identification6.2 Types of Markings6.3 Sleeve and Cable Marker Selection6.4 Placement of Identification Markings6.5 Wiring Installation7 General7.1 Wire Harness Installation7.2 Power Feeders7.3 Service Loops7.4 Drip Loops7.5 Soldering7.6 Strain Relief7.7 Grounding and Bonding7.8 Splicing7.9 Fuel Tank Wiring7.10 Corrosion Preventative Compounds (CPC)
(MIL-C-81309)7.11 Electrical Load Considerations8 General8.1 Methods for Determining the Current-Carrying
Capacity of Wires8.2 Acceptable Means of Monitoring and
Controlling the Electrical Load8.3 Electrical System Components9 General9.1 Alternators9.2 Generators9.3 Ground Power Units9.4 Auxiliary Power Units9.5 Batteries9.6 Circuit Protection Devices9.7 Conduit9.8 Connectors9.9 Inverters and Power Converters9.10 Junctions9.11 Junction Boxes9.12 Electronic Assemblies9.13 Relays9.14 Studs9.15 Switches9.16 Terminals and Terminal Blocks9.17 Waveguides9.18 Electrical System Component Installation10 General10.1 Alternators10.2 Generators10.3 Auxiliary Power Units (APUs)10.4 Batteries10.5 Circuit Protection Devices10.6 Conduit10.7 Connectors10.8 Inverters and Power Converters10.9 Junctions10.10 Junction Boxes, Panels, Shields, and
Microswitch Housings10.11 PC Board Assemblies10.12 Relays10.13 Studs10.14 Switches10.15 Terminals and Terminal Blocks10.16 Waveguides10.17 EMI/RFI11 General11.1 Grounding and Bonding11.2 HIRF11.3 Lightning11.4 Alterations12 General12.1 Wire Substitutions12.2 Commercial Off-the-Shelf (COTS) Components12.3 Electrical Load Considerations12.4 Batteries12.5 Circuit Breakers12.6 Junction Boxes12.7 Relays12.8 Switches12.9 Wire Marking12.10 Wire Bundle Routing12.11 Wire Bundle Combing12.12 Interference Tests12.13 System Safety Assessments12.14 Certification Processes13 General13.1 Certification13.2 Alterations and Maintenance13.3

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.