An electrical wiring interconnection system (EWIS) is also known as an ______________

A complex system's wiring system and components, such as ________ and _________, make up an EWIS.

The aviation industry originally used the term ______________________. The term was changed to EWIS to emphasize the significance of the system's wiring and the actual wires.

In the late 1990s, there were two major airline accidents that were attributed to electrical wiring failures. These accidents were ___________ and __________.

In _______, the FAA established the __________________________ to examine the state of aging aircraft systems. ATSRAC identified EWIS as a major concern. The committee recommended that the FAA develop new regulations to improve the safety and reliability of EWIS.

In ___________, the FAA published new regulations for EWIS. These regulations required that all _________ and ____________ comply with the new EWIS standards. The regulations cover a wide range of topics, including: 1. 2. 3. 4.

The Electrical Wiring Interconnect Systems (EWIS) requirement is mandated in U.S. Federal Aviation Regulations (FAR) ______________ as a precursor to type certification for all transport category aircraft.

The EWIS is designed to be a safe, reliable, and maintainable system. The following are some of the key considerations for EWIS design:

The EWIS must be designed to prevent electrical shock and fire hazards. This includes using properly insulated wires, connectors, and other components.

The EWIS must be able to withstand the rigors of normal operation, as well as extreme conditions such as temperature, vibration, and humidity

The EWIS must be easy to inspect and repair. This includes using easy-to-access components and clear labeling.

There are two main types of EWIS:

This type of EWIS uses individual wires to connect each component to the next.

This type of EWIS uses bundles of wires that are routed together. Typically used for more complex systems.

The following are some of the key components of an EWIS:

are the conductors that carry electrical current. They are typically made of copper or aluminum.

are used to join wires together. They come in a variety of types, including butt connectors, crimp connectors, and solder connectors.

are used to secure wires and harnesses to the aircraft structure.

used to protect wires from damage.

used to protect the EWIS from electrical shock.

are essential tools for removing the insulation from the ends of wires, exposing the conductive copper strands for connection.

These strippers require manual force to remove the insulation. They are simple and inexpensive but may not provide consistent results.

These strippers use a mechanism to automatically adjust to the wire gauge and strip the insulation precisely. They are more efficient and consistent than manual strippers but may be more expensive.

are used to create secure connections between wires and terminals. They apply pressure to deform the terminal barrel, creating a tight grip around the wire strands. Come in various sizes and styles to accommodate different wire gauges and terminal types

are specifically designed for crimping large-gauge wires and lugs. They provide the necessary force to deform the lug barrel and securely connect it to the wire.

is a type of heat-activated plastic tubing that shrinks tightly around wires when heated, providing insulation and protection. Heat guns or heat shrink ovens are used to shrink the tubing.

_________ are used to identify individual wires within a harness. They come in various forms, including:

These markers shrink tightly around the wire when heated, providing a permanent and durable identification.

These markers consist of two layers of plastic that wrap around the wire, providing a protective covering and clear identification.

These markers have adhesive on one side, allowing them to be attached directly to the wire.

are used to bundle and secure wires together, providing organization and protection. They come in various materials, including nylon, plastic, and stainless steel, and different lengths and widths to suit various applications.

is a traditional method of bundling and securing wires using a cord or wire. It provides a flexible and secure way to manage wire harnesses in tight spaces.

are used to check the continuity and integrity of wire connections. They can identify faults, shorts, and open circuits in the harness.

are used to join two or more wires together, creating a secure and electrically conductive path. They come in various types, each with its own specific design and application.

Some common types of wire connectors include:

These connectors are used to join two wires of the same gauge by crimping or soldering the connector barrel onto the exposed copper strands of the wires.

These connectors have a ring- shaped terminal that can be crimped or soldered onto the end of a wire. They are often used to connect wires to terminals or other components.

These connectors have a flat, spade-shaped terminal that can be crimped or soldered onto the end of a wire.

They are often used to connect wires to circuit breakers, fuse holders, and other components with terminal blocks.