What Is a Custom Cable Assembly? Types, Standards, and Applications

A custom cable assembly is a group of wires or cables terminated with connectors and designed to transmit power, data, or signals between electrical components. Unlike a basic wire harness, a cable assembly can be engineered with shielding, protective jackets, strain relief, and environmental protection to meet specific application requirements.

Custom cable assemblies are widely used in industrial automation, robotics, medical equipment, appliances, aerospace, and other demanding applications.

Custom Cable Assembly vs. Wire Harness

Although the terms are sometimes used interchangeably, cable assemblies and wire harnesses are not always the same.

A wire harness is typically a group of individually insulated wires bundled together with tape, sleeves, ties, or other materials. It is commonly used for internal equipment wiring.

A cable assembly generally provides a more integrated construction, often combining multiple conductors inside an outer jacket with connectors at one or both ends. It can also include shielding, strain relief, and environmental protection.

The right construction depends on the application, installation environment, and electrical requirements.

Key Components of a Custom Cable Assembly

1. Conductors

Conductors are selected according to current, voltage, flexibility, and signal requirements. Common options include stranded copper and tinned copper conductors in different wire gauges.

2. Shielding

For applications exposed to electromagnetic interference, cable assemblies can use braided copper, aluminum foil, or combined shielding.

Shielding is particularly important for sensitive signals, industrial communication, sensors, and motor applications.

3. Outer Jacket

The jacket protects the cable from mechanical damage, moisture, chemicals, and temperature changes.

Common materials include:

• PVC – general-purpose applications
• TPE – flexible applications
• PUR – high-flex and abrasion-resistant applications
• PTFE/FEP – high-temperature and chemical-resistant applications

4. Connectors and Strain Relief

Custom cable assemblies can integrate connectors from various manufacturers according to the equipment interface.

Proper strain relief and termination help reduce mechanical stress on the cable and improve long-term reliability.

Common Standards and Requirements

Depending on the application and market, custom cable assemblies may need to meet requirements such as:

• UL 758 – appliance wiring material
• IPC/WHMA-A-620 – cable and wire harness workmanship
• RoHS – restriction of hazardous substances
• REACH – chemical substance compliance
• IP67/IP68 – protection against dust and water when the complete assembly is designed and tested accordingly

The applicable standards should always be determined based on the end product, installation environment, and customer specifications.

Where Are Custom Cable Assemblies Used?

Custom cable assemblies are commonly found in:

• Industrial automation – sensors, PLCs, motors, and control systems
• Robotics – robotic arms, end-effectors, sensors, and dynamic applications
• Medical equipment – power and signal connections
• Home and commercial appliances – control boards, motors, heaters, and sensors
• UAVs and drones – power, data, and communication systems
• Renewable energy equipment – power and control connections

Why Choose a Custom Cable Assembly?

A custom assembly can be designed around the actual requirements of your equipment, including cable length, conductor size, connector type, shielding, jacket material, bend radius, and environmental conditions.

For complex equipment, the right cable construction can help improve installation efficiency, reliability, and service life.

Looking for a Custom Cable Assembly?

At Xiamen Changjing Electronic Technology, we manufacture custom cable assemblies and wire harnesses for robotics, industrial automation, appliances, UAVs, and other applications.

We can manufacture according to your drawings, samples, BOMs, and technical specifications, from prototypes and small batches to regular production.

Contact us to discuss your custom cable assembly requirements.