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What is yellow-green (earth color scheme) heat shrink tubing?
Technical · Heat Shrink Tube · Earth Identification
What is a Yellow-Green Heat Shrink Tube?
What is a Yellow-Green Heat Shrink Tube?
Types, Standard Ratios, Applications, and Use Cases
Conclusion: IEC standards mandate "yellow-green stripes" for earth wire (grounding wire) identification, and heat shrink tubing that can be applied afterwards is effective.
Heat shrink tubing, characterized by its yellow and green striped pattern, is a widely used insulation protection material for identifying earth wires (grounding wires). International standards such as CE marking and IEC (International Electrotechnical Commission) specify "yellow-green stripes" for earth wires, and heat shrink tubing is highly effective as a means to apply this color identification after the fact.
Yellow-Green Color Ratio and Standard Relationship
Color Specification in IEC 60445 / CE Marking
Earth wires (PE: Protective Earth) are required to be identified by "green/yellow (green/yellow stripes)". Clear identification of earth wires is a crucial requirement for ensuring the safety of electrical equipment.
Yellow — Minimum 30% or more Green — Minimum 30% or more
Standard Requirement: The proportion of either yellow or green must not be less than 30%. The recommended ratio is approximately 50:50 for an even distribution.
Differences in Manufacturing Methods and Quality
Yellow and green stripes are formed through the following processes. Quality, cost, and durability vary depending on the manufacturing method.
1
Method 01 · Recommended
Co-extrusion (Simultaneous two-color molding)Recommended
A method where yellow and green resins are simultaneously extruded and molded. This results in minimal color deviation and high precision. While the cost may be slightly higher, it is the optimal manufacturing method when quality is paramount.
Our earth identification heat shrink tubing is manufactured using this co-extrusion method.
2
Method 02
Printing MethodLow Cost
A method where one color is printed onto a base tube (of the other color). This method is prone to misalignment and blurring but offers lower manufacturing costs. Caution is needed regarding print peeling during long-term use.
3
Method 03
Laminated Layer MethodBeware of layer peeling
A method where two colored films are layered. While manufacturing is relatively easy, there is a risk of layer peeling, so caution is advised for long-term use in harsh environments.
Actual Use Cases
| Use Case | Application Examples/Purpose |
|---|---|
| Modification/Repair of control panels | Easily adding earth identification tubing to existing wiring for compliance. |
| CE compliance for overseas equipment | Quickly achieve IEC 60445 / CE marking compliance by coloring standard electrical wires. |
| Construction machinery/vehicle harnesses | Ensuring visibility along with vibration resistance and weather resistance. Contributes to safety identification in harsh environments. |
| Enhanced safety marking for equipment | Promoting safety awareness with yellow-green stripes to prevent incorrect connections and electric shock accidents. |
Denka Electron's Heat Shrink Tubing for Earth Identification
Our "Heat Shrink Tubing for Earth Identification" is a product with superior quality, workability, and safety.
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Yellow-green stripe compliant with IEC standards (high-precision co-extrusion molding)
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Material design with excellent heat resistance, flame retardancy, and flexibility
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Wide range of sizes from small to large diameters
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Supports small lots and short delivery times
Product
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View Heat Shrink Tubing for Earth Identification (Yellow-Green Stripe) List
Summary
Standards/Applications
IEC 60445 / CE Marking specifies this as the earth wire identification color. Retrofitting is possible.
Color Ratio
Both yellow and green must be 30% or more. A 50:50 equal distribution is recommended.
Manufacturing Method
Co-extrusion (two-color simultaneous molding) is the highest quality. Our products adopt this method.
Features of Our Products
IEC compliant, heat and flame resistant, small to large diameter range, support for small lots and short delivery times
Contact Us for Heat Shrink Tubing for Earth Identification
We also accept requests for samples, size selection, and consultations regarding CE compliance.
