1、Designation: F2639 071Standard Practice forDesign, Alteration, and Certification of Airplane ElectricalWiring Systems1This standard is issued under the fixed designation F2639; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the ye
2、ar of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1NOTEAdded 1.5 editorially in September 2012.1. Scope1.1 DefinitionThis practice defines acceptable practicesand processes f
3、or the design, alteration, and certification ofelectric systems and installations in general aviation aircraft.This practice does not change or create any additional regula-tory requirements nor does it authorize changes in or permitdeviations from existing regulatory requirements.1.2 ApplicabilityT
4、he guidance provided in this practice isdirected to air carriers, air operators, design approval holders,Supplemental Type Certificate (STC) holders, maintenanceproviders, repair stations, and anyone performing field ap-proval modifications or repairs.1.3 Protections and CautionsThis practice provid
5、es guid-ance for developing actions and cautionary statements to beadded to maintenance instructions for the protection of wireand wire configurations. Maintenance personnel will use theseenhanced procedures to minimize contamination and acciden-tal damage to electrical wiring interconnection system
6、 (EWIS)while working on aircraft.1.4 “Protect and Clean As You Go” PhilosophyThisphilosophy is applied to aircraft wiring through inclusion inoperatorsmaintenance and training programs. This philosophystresses the importance of protective measures when workingon or around wire bundles and connectors
7、. It stresses howimportant it is to protect EWIS during structural repairs, STCinstallations, or other alterations by making sure that metalshavings, debris, and contamination resulting from such workare removed.1.5 This practice includes the following sections:Title SectionWire Selection 5General 5
8、.1Aircraft Wire Materials 5.2Table of Acceptable Wires 5.3Severe Wind and Moisture Problems (SWAMP) 5.4Grounding and Bonding 5.5Electrical Wire Chart 5.6Wire and Cable Identification 6General 6.1Wire and Cable Identification 6.2Types of Markings 6.3Sleeve and Cable Marker Selection 6.4Placement of I
9、dentification Markings 6.5Wiring Installation 7General 7.1Wire Harness Installation 7.2Power Feeders 7.3Service Loops 7.4Drip Loops 7.5Soldering 7.6Strain Relief 7.7Grounding and Bonding 7.8Splicing 7.9Fuel Tank Wiring 7.10Corrosion Preventative Compounds (CPC)(MIL-C-81309)7.11Electrical Load Consid
10、erations 8General 8.1Methods for Determining the Current-CarryingCapacity of Wires8.2Acceptable Means of Monitoring andControlling the Electrical Load8.3Electrical System Components 9General 9.1Alternators 9.2Generators 9.3Ground Power Units 9.4Auxiliary Power Units 9.5Batteries 9.6Circuit Protectio
11、n Devices 9.7Conduit 9.8Connectors 9.9Inverters and Power Converters 9.10Junctions 9.11Junction Boxes 9.12Electronic Assemblies 9.131This practice is under the jurisdiction ofASTM Committee F39 on Normal andUtility Category Airplane Electrical Wiring Systems and is the direct responsibilityof Subcom
12、mittee F39.01 on Design, Alteration, and Certification of ElectricalSystems.Current edition approved Sept. 1, 2007. Published October 2007. DOI: 10.1520/F2639-07E01.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.Relays 9.14Studs 9.1
13、5Switches 9.16Terminals and Terminal Blocks 9.17Waveguides 9.18Electrical System Component Installation 10General 10.1Alternators 10.2Generators 10.3Auxiliary Power Units (APUs) 10.4Batteries 10.5Circuit Protection Devices 10.6Conduit 10.7Connectors 10.8Inverters and Power Converters 10.9Junctions 1
14、0.10Junction Boxes, Panels, Shields, andMicroswitch Housings10.11PC Board Assemblies 10.12Relays 10.13Studs 10.14Switches 10.15Terminals and Terminal Blocks 10.16Waveguides 10.17EMI/RFI 11General 11.1Grounding and Bonding 11.2HIRF 11.3Lightning 11.4Alterations 12General 12.1Wire Substitutions 12.2Co
15、mmercial Off-the-Shelf (COTS) Components 12.3Electrical Load Considerations 12.4Batteries 12.5Circuit Breakers 12.6Junction Boxes 12.7Relays 12.8Switches 12.9Wire Marking 12.10Wire Bundle Routing 12.11Wire Bundle Combing 12.12Interference Tests 12.13System Safety Assessments 12.14Certification Proce
16、sses 13General 13.1Certification 13.2Alterations and Maintenance 13.31.6 ValuesThe values given in inch-pound units are to beregarded as the standard. The values in parentheses are forinformation only. See Appendix X2 for SI-based prefixes andpowers of 10.NOTE 1Where SI units are required, refer to
17、Annex 5 of ICAO.1.7 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use
18、.2. Referenced Documents2.1 Unless approved by the administrator, the latest revisionof the listed documents shall be used for reference.2.2 ASTM Standards:2F2490 Guide forAircraft Electrical Load and Power SourceCapacity Analysis2.3 ANSI Standards:3ANSI/EIA-5200000 Generic Specification for Special
19、-UseElectromechanical Switches of Certified QualityANSI EIA/TIA-568-B Commercial Building Telecommuni-cations Cabling StandardANSI J-STD-004 Requirements for Soldering Fluxes2.4 FAA Standards:4Advisory Circular 20-53A Protection of Aircraft Fuel Sys-tems Against Fuel Vapor Ignition Due To LightningA
20、C 20-136 Protection of Aircraft Electrical/Electronic Sys-tems Against the Indirect Effects of LightningAC 21-160E RTCA Document DO-160EAC 23.1309-1C Equipment, Systems, and Installations inPart 23 AirplanesAC 25-16 Electrical Fault and Fire Prevention and Protec-tionAC 25.869-1 Electrical System Fi
21、re and Smoke ProtectionAC 25.981-1B Fuel Tank Ignition Source PreventionGuidelinesAC 25.1353-1 Electrical Equipment and InstallationsAC 25.1357-1 Circuit Protective Device AccessibilityDOT/FAA/CT 86/8 Determination of Electrical Propertiesof Bonding and Fastening TechniquesDOT/FAA/CT-83/3 Users Manu
22、al for FAAAdvisory Circu-lar 20-53aDOT/FAA/CT-89-22 Aircraft Lightning Protection Hand-bookTitle14 Code of Federal Regulations Part 23 AirworthinessStandards: Normal, Utility, Acrobatic, and CommuterCategory AirplanesTitle14 Code of Federal Regulations Part 25 AirworthinessStandards: Transport Categ
23、ory AirplanesTitle14 Code of Federal Regulations Part 27 AirworthinessStandards: Normal Category RotorcraftTitle14 Code of Federal Regulations Part 29 AirworthinessStandards: Transport Category RotorcraftTitle14 Code of Federal Regulations Part 31 AirworthinessStandards: Manned Free BalloonsTitle14
24、Code of Federal Regulations Part 33 AirworthinessStandards: Aircraft EnginesTitle14 Code of Federal Regulations Part 34 Fuel Ventingand Exhaust Emission Requirements for Turbine EnginePowered AirplanesTitle14 Code of Federal Regulations Part 35 AirworthinessStandards: PropellersTitle14 Code of Feder
25、al Regulations Part 36 Noise Stan-dards: Aircraft Type and Airworthiness Certification2.5 SAE Standards:5AMS-S-8802 Sealing Compound, Temperature-Resistant,Integral Fuel Tanks and Fuel Cell Cavities, HighAdhesion(Replaces MIL-S-8802)2For referenced ASTM standards, visit the ASTM website, www.astm.or
26、g, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Available from American National Standards Institute (ANSI), 25 W. 43rd St.,4th Floor, New York, NY 10036, http:/www.ansi.org.4
27、Available from U.S. Government Printing Office Superintendent of Documents,732 N. Capitol St., NW, Mail Stop: SDE, Washington, DC 20401, http:/www.access.gpo.gov.5Available from Society of Automotive Engineers (SAE), 400 CommonwealthDr., Warrendale, PA 15096-0001, http:/www.sae.org.F2639 0712ARP1199
28、 Selection,Application, and Inspection of ElectricOvercurrent Protective DevicesARP 1308 Preferred Electrical Connectors for AerospaceVehicles and Associated EquipmentARP 1870 Aerospace Systems Electrical Bonding andGrounding for Electromagnetic Compatibility and SafetyARP 1928 Torque Recommendation
29、s for Attaching Electri-cal Wiring Devices to Terminal Boards or Blocks, Studs,Posts, EtcARP 4761 Guidelines and Methods for Conducting theSafetyAssessment Process on CivilAirborne Systems andEquipmentARP 5369 Guidelines for Wire Identification Marking Us-ing the Hot Stamp ProcessARP 5414 Aircraft L
30、ightning ZoningARP 5583 Guide to Certification of Aircraft in a HighIntensity Radiated Field (HIRF) EnvironmentAS 4372 Performance Requirements for Wire, Electric,Insulated Copper or Copper AlloyAS 4373 Test Methods for Insulated Electric WireAS 4461 Assembly and Soldering Criteria for High Quality/
31、High ReliabilityAS 6136 Conduit, Electrical, Flexible, Shielded, AluminumAlloy for Aircraft Installations. (Replaces MIL-C-6136)AS 7351 Clamp, Loop Type Bonding-FSC 5340 (replacesAN735)AS 7431 Bracket, Support Clamp-FSC 5340 (replacesAN743)AS 7928 Terminals, Lug: Splices, Conductor: Crimp Style,Copp
32、er, General Specification for (Replaces MIL-T-7928)AS 22759 Wire, Electrical, Fluoropolymer-Insulated, Cop-per or Copper Alloy. (Replaces MIL-W-22759)AS 23190 Straps, Clamps, Plastic and Metal, and MountingHardware, Plastic for Cable Harness Tying and SupportClamp, Loop, Metal, Cushioned, Adjustable
33、, Wire Sup-port, Type V, Class 1-FSC (replaces MIL-S-23190)AS 25064 Conduit, Flexible, Radio Frequency Shieldinguse in place of MIL-C-7931?AS 25281 Clamp, Loop, Plastic, Wire Support-FSC 5340(replaces MS25281)AS 25435 Terminal-Lug, Crimp Style, Straight Type, forAluminum Aircraft Wire, Class 1 (Repl
34、aces MS254350)AS 25436 Terminal-Lug, Crimp Style, 90 Upright Type,forAluminumAircraft Wire, Class 1 (Replaces MS25436)AS 25438 Terminal-Lug, Crimp Style RightAngleType, forAluminum Aircraft Wire, Class 1 (Replaces MS25438)AS 33671 Strap, Tie Down, Electrical Components,Adjust-able, Self Clinching, P
35、lastic, Type I, Class 1 (ReplacesMS3367)AS 50881A Wiring Aerospace Vehicle (Replaces MIL-W-5088)AS 70991 Terminal, Lug and Splice, Crimp Style Alumi-num, for Aluminum Aircraft Wire. (Replaces MIL-T-7099E)2.6 Military Standards:4A-A-52080 Nylon Lacing Tape (replaces MIL-T-43435)A-A-52081 Polyester La
36、cing Tape (replaces MIL-T-43435)A-A-52082 Tape, Lacing and Tying, TFE Fluorocarbon(tetra fluorocarbon) (replaces MIL-T-43435)A-A-52083 Tape, Lacing and Tying, Glass (replaces MIL-T-43435)A-A-52084 Tape, Lacing and Tying,Aramid (replaces MIL-T-43435)A-A-59163 Insulation Tape, Electrical, Self Adherin
37、g, Un-supported Silicone RubberAN735 ClampAN960JD10L Conductive WasherMIL-C-22520 Wire Termination Crimp ToolsMIL-C-26482 Connectors, Electrical, (Circular, Miniature,Quick Disconnect, Environment Resisting), Receptaclesand Plugs, General Specification forMIL-C-39029 Contacts, Electrical Connector,
38、GeneralSpecification forMIL-PRF-81309 Corrosion Preventative Compounds, Wa-ter Displacing, Ultra-Thin FilmMIL-DTL-22520 Crimping Tools, Wire Termination, Gen-eral Specification for (replaces MIL-C-22520/2)MIL-DTL-27500 Cable, Power, Electrical and Cable Spe-cial Purpose, Electrical Shielded and Unsh
39、ielded, GeneralSpecification forMIL-DTL-5015 Connectors, Electrical, Circular Threaded,AN Type, General Specification forMIL-DTL-83723 Connectors, Electrical, (Circular, Envi-ronment Resisting), Receptacles and Plugs, GeneralSpecification forMIL-F-14256F Flux, Soldering, Liquid, Paste Flux, SolderPa
40、ste and Solder-Paste Flux (for Electronic/Electricaluse), General Specification forMIL-M-81531 Marking of Electrical Insulating MaterialsMIL-PRF-39016 Relays Electromagnetic, Established Reli-ability, General Specification forMIL-PRF-5757 Relays, Hermetically SealedMIL-PRF-6106 Relays, Electromagnet
41、ic, General Specifi-cation forMIL-PRF-83536 Relays, Electromagnetic, Established Re-liability, 25Amperes and Below, General Specification forMIL-S-8516 Sealing Compound, Polysulfide Rubber, Elec-tric Connectors and Electric Systems, Chemically CuredMIL-STD-704 Aircraft, Electrical Power Characterist
42、icsMIL-T-8191 Test and Checkout Equipment, Guided MissileWeapons Systems, General Specification for should thisbe SAE AMS-T-81914 replaces MIL-T-81914?MIL-W-25038 Wire, Electrical, High-Temperature, Fire Re-sistant, and Flight CriticalMIL-W-81044 Wire, Electric, Crosslinked Polyalkene,Crosslinked Al
43、kine-Imide, or Polyarylene Insulated, Cop-per or Copper AlloyMIL-W-81381 Wire, Electric, Fluorocarbon/Polyimide In-sulatedMS21919 Cable ClampsMS25440 Flat WasherMS3057 Cable Clamp AdaptersMS3109 Boots, Heat-Shrinkable, Strain-Relief, RightAngleF2639 0713MS3115 Connectors, Receptacle, Electrical, Dum
44、my Stow-age, Bayonet Coupling, for MIL-C-26482 Connectors,Series 1 and 2MS3117 Boots, Heat-Shrinkable, Strain-Relief, RightAngleMS3142 Connector, Receptacle, Electrical, Box Mounting,Solder Contact Hermetic, AN TypeMS3143 Connector, Receptacle, Electrical, Solder Mount-ing, Solder Contact Hermetic,
45、AN TypeMS3158 Backshells Shrinkable Boot, for Electric Connec-torMS3180 Cover, Protective, Electrical Connector Plug,Bayonet Coupling for MIL-C-26482 ConnectorsMS3181 Cover, Protective, Electrical Connector Recep-tacle, Bayonet Coupling for MIL-C-26482 ConnectorsMS3416 Backshells, Straight, for Elec
46、trical ConnectorsMS3440 Connectors, Receptacle, Electric Series 2, NarrowFlange Mount, Bayonet Coupling, Solder Pin ContactClass HMS3443 Connectors, Receptacle, Electric, Series 2, SolderFlange Mount, Bayonet Coupling, Solder Pin ContactClass HMS3450 Connectors, Receptacle, Electrical, Wall Mount-in
47、g, Rear Release, Crimp Contact, AN TypeMS3451 Connectors Receptacle, Electrical, Cable Connect-ing, Rear Release, Crimp Contact, AN TypeMS3452 Connector, Receptacle, Electric, Box Mounting,Rear Release, Crimp Contact, AN TypeMS3456 Connectors, Plug, Electrical, Rear Release, CrimpContact, AN TypeMS3
48、459 Connector, Plug, Electrical, Self-Locking, Cou-pling Nut, Rear Release, Crimp Contact, AN TypeMS3470 Connectors, Receptacle, Electric, Series 2, SingleHole Mount, Bayonet Coupling, Solder Pin Contact, ClassHMS3471 Connector, Receptacle, Electric, Series 2, CrimpType, Cable Connecting, Bayonet Co
49、upling, ClassesA, L,S, and WMS3472 Connector, Receptacle, Electric, Series 2, CrimpType, Wide Flange Mounting, Bayonet Coupling, ClassesA, L, S, and WMS3475 Connector, Plug Electric, RFI Shielded, Series 2,Crimp Type, Bayonet Coupling, Classes L, S, and WMS3476 Connector, Plug Electric, Series 2, Crimp Type,Bayonet Coupling, Classes A, L, S, and WMS25437 Terminal-LugMS35489 GrommetMS90387 Tool, Hand, Adjustable for Plastic and Metal TieDown StrapsQQ-S-571 Solder, Electronic (96 to 485 Deg C)2.7 Other Standards:RTCA DO-160 Environmental Conditions and Test Proce-d
