Podcast
Questions and Answers
What is the recommended insulating sleeve length for a 2 AWG wire splice?
What is the recommended insulating sleeve length for a 2 AWG wire splice?
- 2-1/8 inches
- 2-13/32 inches (correct)
- 2-15/16 inches
- 2-25/32 inches
Why should splicing of electrical wire be kept to a minimum?
Why should splicing of electrical wire be kept to a minimum?
- It is time-consuming
- It is subject to extreme vibrations (correct)
- It is prone to faults
- It is only allowed in specific locations
What type of splice connector is preferred for use in aircraft?
What type of splice connector is preferred for use in aircraft?
- Splice connector with a metal sleeve
- Non-insulated splice connector
- Insulated splice connector with a plastic sleeve
- Self-insulated splice connector (correct)
What is the maximum number of splices allowed in one wire segment between connectors?
What is the maximum number of splices allowed in one wire segment between connectors?
What is the purpose of covering a non-insulated splice connector with plastic sleeving?
What is the purpose of covering a non-insulated splice connector with plastic sleeving?
Why should splicing of individual wires in a group or bundle require engineering approval?
Why should splicing of individual wires in a group or bundle require engineering approval?
When is it acceptable to have multiple splices in one wire segment?
When is it acceptable to have multiple splices in one wire segment?
What is the recommended approach to splicing electrical wires in aircraft?
What is the recommended approach to splicing electrical wires in aircraft?
What is the characteristic of splice pre-insulation?
What is the characteristic of splice pre-insulation?
What is the purpose of the colour-coding on splices?
What is the purpose of the colour-coding on splices?
What is the approved tool for crimping M81824 environmental splices?
What is the approved tool for crimping M81824 environmental splices?
How many times must the crimping operation be performed for M81824 environmental splices?
How many times must the crimping operation be performed for M81824 environmental splices?
Where should mount cable clamps be directly attached to?
Where should mount cable clamps be directly attached to?
What is the purpose of the inspection hole in the splice?
What is the purpose of the inspection hole in the splice?
What type of bracket should be used when the structural member is angled?
What type of bracket should be used when the structural member is angled?
What is the stripping length for #26 and #24 wires?
What is the stripping length for #26 and #24 wires?
What is used to provide electrical and mechanical protection to uninsulated splices?
What is used to provide electrical and mechanical protection to uninsulated splices?
What is the primary consideration when selecting clamps for wire bundles?
What is the primary consideration when selecting clamps for wire bundles?
What is the recommended test to ensure the clamp is secure on RF cables?
What is the recommended test to ensure the clamp is secure on RF cables?
What is the characteristic of uninsulated splices?
What is the characteristic of uninsulated splices?
Why should metal clamps be avoided on coaxial RF cables?
Why should metal clamps be avoided on coaxial RF cables?
What should be installed when there is less than 1 cm clearance between the bulkhead cut-out and the wire bundle?
What should be installed when there is less than 1 cm clearance between the bulkhead cut-out and the wire bundle?
Why should the attachment hardware of cable clamps be positioned above them?
Why should the attachment hardware of cable clamps be positioned above them?
What can be used to achieve a snug fit on wire bundles when required?
What can be used to achieve a snug fit on wire bundles when required?
What is a major concern when installing and maintaining coaxial cable?
What is a major concern when installing and maintaining coaxial cable?
What is the recommended practice for routing coaxial cable around corners?
What is the recommended practice for routing coaxial cable around corners?
Why should cable ties not be used with coaxial cable?
Why should cable ties not be used with coaxial cable?
What is the purpose of grounding the braided outer conductor of coaxial cable?
What is the purpose of grounding the braided outer conductor of coaxial cable?
Why is it important to support coaxial cable at regular intervals?
Why is it important to support coaxial cable at regular intervals?
What can happen if a coaxial cable becomes kinked or dented?
What can happen if a coaxial cable becomes kinked or dented?
What should be done when installing coaxial cable?
What should be done when installing coaxial cable?
What can happen if the length of a coaxial cable is changed during maintenance?
What can happen if the length of a coaxial cable is changed during maintenance?
At what maximum interval should wires and cables be supported by suitable clamps or devices?
At what maximum interval should wires and cables be supported by suitable clamps or devices?
Why must metal stand-offs be used to maintain clearance between wires and structure?
Why must metal stand-offs be used to maintain clearance between wires and structure?
What is the purpose of insulating tubing?
What is the purpose of insulating tubing?
Why should wires and cables be routed carefully?
Why should wires and cables be routed carefully?
What is the recommended way to secure insulating tubing?
What is the recommended way to secure insulating tubing?
What is prohibited in place of stand-offs for maintaining clearance?
What is prohibited in place of stand-offs for maintaining clearance?
Why is it important to properly support wires and cables?
Why is it important to properly support wires and cables?
What should be done with wires and cables in junction boxes, panels, and bundles?
What should be done with wires and cables in junction boxes, panels, and bundles?
Study Notes
Mounting Cable Clamps
- Mount cable clamps directly to Z members of the structure.
- Use an angle bracket with two mounting screws if the structural member is angled.
Cable Clamps on Wire Bundles
- Select clamps to achieve a snug fit without pinching wires.
- Ensure clamps do not allow the bundle to move through the clamp when a slight axial pull is applied.
Cable Clamps on RF Cables
- Ensure clamps fit without crushing the cable.
- Select clamps that are snug enough to prevent the cable from moving freely through the clamp but allow the cable to slide through the clamp when a light axial pull is applied.
Wire Bundles Near Bulkheads
- Install a suitable grommet if there is less than 1 cm (3/8 of an inch) clearance between the bulkhead cut-out and the wire bundle.
Clamp Installation
- Install clamps with their attachment hardware positioned above them, wherever practicable, to prevent rotation due to wire bundle weight or chafing.
Splicing
Splicing Procedure for M81824 Environmental Splices
- Crimp twice, once for each end of the splice.
- Strip wires according to the table below:
- #26 and #24: 5/32 inches
- #22 - #14: 7/32 inches
- #12 - #10: 5/16 inches
- Check that wire ends are visible through the inspection hole after crimping.
Splicing Large Copper Wires
- Use uninsulated splices for large copper wires (No. 8 through No. 4/0).
- Insulate splices with either heat-shrink tubing or transparent flexible sleeving after assembly.
General Requirements for Splicing
- Keep splicing to a minimum and avoid splicing in locations subject to extreme vibrations.
- Avoid splicing individual wires in a group or bundle without engineering approval.
- Use self-insulated splice connectors or non-insulated splice connectors with plastic sleeving.
Coaxial Cable Installation Precautions
- Install coaxial cables directly and as short as possible to minimize radio frequency interference (RFI) hazards.
- Ground the braided outer conductor at one or both ends to protect electronic circuitry.
- Avoid using cable ties, which can crush the dielectric and damage the cable.
- Route cables with a minimum bend radius of 6 times the diameter of the cable to prevent kinking.
Wire Support
- Support wires and cables at intervals of not more than 24 in. with suitable clamps, grommets, or other devices.
- Ensure supports do not restrict wires or cables in a manner that interferes with equipment operation.
- Use metal stand-offs to maintain clearance between wires and structure.
- Insulating tubing is secured by tying, tie straps, or clamps, but not used as an alternative to stand-offs for maintaining clearance.
Protection
- Route wires and cables to prevent chafing against the airframe or other components.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Related Documents
Description
Learn about the proper installation and selection of cable clamps, including mounting considerations and wire bundle fitting. Ensure secure and damage-free connections.
