Question 1

What is a thin-walled yellow/green Schrup hose?

Accepted Answer

Shrink tubing thin-walled yellow/green is an insulation shrink tubing for clear conductor identification and electrical insulation. The yellow/green heat-shrink tubing is used as heat-shrink tubing for wire identification in industry, in particular as heat-shrink tubing for protective conductors, switch cabinet construction, wiring, wire insulation, repair of cable insulation and for mechanical protection of wires. Technically relevant here are Shrink ratio 2:1Shrink start from 100 °CApplication range -55 °C to +135 °CLongitudinal shrinkage max. -5 %. The design is self-extinguishing in accordance with VG 95 343/2 and supports robust, reliable assembly in limited installation space.

Question 2

What do the colors yellow and green mean and how does thin-walled shrink tubing yellow/green differ from other shrink tubing?

Accepted Answer

In electrical engineering, the color combination yellow/green stands for the protective conductor and is used for the clear visual assignment of safety-relevant conductors. Yellow/green heat-shrinkable tubing therefore supports low-error installation, testing and maintenance in industrial wiring.

Compared to thick-walled versions, shrink tubing thin-walled green/yellow is designed for low installation height and good processability in tight installation spaces. Thin-walled yellow/green heat shrink tubing is therefore the preferred choice when marking and electrical insulation need to be combined in compact assemblies. As yellow/green heat-shrink tubing, it is particularly relevant for structured cable routing in the control cabinet.

Question 3

When is yellow and when is green shrink tubing used in accordance with standards and how do you process thin-walled yellow/green shrink tubing?

Accepted Answer

Yellow/green is normally assigned to the PE conductor color. Yellow/green heat-shrinkable tubing is therefore used when PE conductors need to be clearly marked or repaired. Green/yellow shrink sleeves are mandatory in electrical installations to prevent confusion with active conductors; yellow or green alone is not permitted for this purpose.

When is only yellow used?

Special case of device/connection marking: In practice, yellow is used as the identification color for conductor/terminal markings for protective conductor connections (equipment markings), not as the "PE conductor color" in the installation.
Important: Green-yellow is still relevant for the PE conductor function in the wiring system.

When is only green used?

Rarely and only in clearly separated marking systems, e.g. as a purely internal marking color in assemblies/control cabinets, if it can be proven that there can be no confusion with PE (and no green-yellow conductors in the same environment are misunderstood as functional carriers). This is in line with IEC logic.
For PE conductors, green alone is not the standard-compliant marking in the installation context.

Green/yellow heat-shrink tubing is applied by pushing it onto the conductor and heating it with hot air in a controlled manner. The tubing fits snugly and ensures insulation and identification.

Shrink tubing green/yellow is particularly suitable for re-insulation, repairs and structured wiring in switch cabinets where conformity to standards and clear visual inspection are required.

Question 4

Why is green shrink tubing PE-coded?

Accepted Answer

Yellow/green is PE-coded because standards such as IEC 60445 (and in installation, e.g. VDE 0100-510) reserve the two-color marking exclusively for the PE conductor. A yellow/green shrink sleeve makes earthing and PE connections immediately visible during testing and maintenance and reduces the risk of confusion in assemblies.

Thin-walled yellow/green shrink tubing is used for compact wiring: low installation height, clean marking on conductor ends, suitable for series production in the control cabinet. Shrink tubing green/yellow does not replace a conductor function, but ensures identification and insulation at the connection.

Question 5

For which cable diameters is thin-walled shrink tubing yellow/green suitable?

Accepted Answer

The thin-walled yellow/green heat shrink tubing is designed for a wide range of conductor and cable diameters and is selected according to the initial diameter before shrinking. The typical shrink ratio of 2:1 means that both fine-stranded cores and multi-core cables can be safely covered, provided that the maximum cable diameter is less than the nominal diameter in the unshrunk state. In practice, green/yellow heat -shrinkable tubing is used for small cross-sections in control cabinet wiring as well as for thicker protective conductors. Green/yellow heat-shrinkable tubing enables form-fit adaptation without excessive wall build-up. Correct dimensioning is crucial to ensure that green/yellow heat -shrinkable tubing fulfills its insulation and marking function in the long term.

Question 6

How does shrink tubing yellow green comply with DIN EN 60445?

Accepted Answer

Shrink tubing yellow/green complies with DIN EN 60445 due to the clear and permanent color coding of the protective conductor. The standard requires that green/yellow is used exclusively for PE functions and remains clearly recognizable even after installation. Green/yellow heat-shrinkable tubing meets this requirement directly at contact points and conductor ends. Thin-walled yellow/green shrink tubing is used in compact wiring, as it enables marking without any relevant loss of installation space. Controlled longitudinal shrinkage ensures defined coverage. The self-extinguishing version in accordance with VG 95 343/2 supports standard-compliant use in industrial earthing and switch cabinet applications.

Feature	Value
Wall	thin-walled
Glue	without inside adhesive
Shrinkage ratio	2 : 1
Continuous operating temperature	-55 ºC - + 135 ºC
Min. shrink temperature	100 ºC
Tensile strength (N/mm2)	18
Elongation at break (%)	400
Longitudinal shrinkage	-5 % max.
Dielectric strength	450 KV / cm
Self-extinguishing	yes, according to VG 95 343/2

Shrink tubing thin-walled yellow/green