PVC trunking is one of the most widely used cable management solutions in residential, commercial, and industrial electrical installations. It provides a safe, organized, and durable pathway for electrical and data cables, protecting them from mechanical damage, dust, and fire hazards.
As a professional PVC trunking factory with over 20 years of manufacturing experience, SW supplies standard and custom PVC trunking to global brands. To help our customers better understand product selection, this guide introduces the common specifications, sizes, and technical parameters of PVC trunking.
1. Common Specifications of PVC Trunking
PVC trunking comes in a variety of dimensions and designs, depending on cable load, application environment, and installation requirements.
1.1 Standard Sizes
Typical sizes (width × height) include:
10 × 10 mm – suitable for light wiring, small devices, and communication lines
16 × 16 mm – for small cable runs in residential applications
25 × 16 mm – common for low-voltage wiring and data lines
25 × 25 mm – compact square trunking for multiple small wires
40 × 25 mm – medium load, offices, and commercial use
50 × 50 mm – larger capacity for power and data cables
60 × 40 mm – medium-to-heavy wiring installations
100 × 50 mm – high-capacity trunking for industrial or infrastructure projects
👉 Lengths are usually supplied in 2m or 3m sections, but custom lengths are available.
1.2 Profile Types
Plain trunking (solid cover) – general cable management
Slotted trunking (wiring duct) – widely used in control panels and switchboards
Round edge trunking – for better aesthetics in visible installations
Flexible trunking – for special projects requiring bendability
2. Common specifications of PVC trunking
| Model | Width (mm) | Height (mm) | Thickness (mm) | Length (m/roll) | Color | Material |
|---|---|---|---|---|---|---|
| T20 | 20 | 12 | 1.0 | 2.0/2.9 | White | UPVC |
| T25 | 25 | 14 | 1.2 | 2.0/2.9 | White/Gray | Lead-Free PVC |
| T40 | 40 | 16 | 1.2 | 2.0/2.9 | White | UV-Stabilized |
| T60 | 60 | 22 | 1.5 | 2.0/2.9 | Gray | FR PVC |
| T80 | 80 | 25 | 1.8 | 2.0/2.9 | White | Industrial |
| T100 | 100 | 30 | 2.0 | 2.0/2.9 | Black | Heavy-Duty |
| T150 | 150 | 50 | 2.5 | 2.0/2.9 | Gray | Co-extruded |
3. Technical Parameters of PVC Trunking
3.1 Material Composition
Base resin: Polyvinyl Chloride (PVC)
Additives: stabilizers, flame retardants, UV stabilizers, pigments
Halogen-free or low-smoke formulations available on request
3.2 Mechanical Properties
Tensile Strength: ≥ 45 MPa (depending on grade)
Impact Resistance: High impact-modified PVC available
Dimensional Tolerance: ±0.3 mm typical for extrusion
3.3 Electrical Properties
Dielectric Strength: > 40 kV/mm
Insulation Resistance: > 100 MΩ
Non-conductive material ensures safety in electrical installations
3.4 Thermal Properties
Service Temperature Range: -15°C to +60°C
Heat Distortion Temperature (HDT): ≥ 60°C
Self-Extinguishing: PVC trunking is flame-retardant and stops burning once the flame source is removed
3.5 Fire & Safety Compliance
Flame retardancy: UL94 V-0 or V-1 (depending on grade)
Low smoke and halogen-free grades available for public infrastructure
3.6 Environmental Resistance
UV Resistance: Outdoor UV-stabilized PVC available
Moisture Resistance: Excellent (does not absorb water)
Corrosion Resistance: Resistant to acids, alkalis, and most chemicals
4. PVC trunking Technical Parameters
| Category | Specification / Range | Notes |
|---|---|---|
| Standard Lengths | 2m / 3m (custom available) | Industry standard, custom lengths for projects |
| Common Sizes (W × H, mm) | 10×10, 16×16, 25×16, 25×25, 40×25, 50×50, 60×40, 100×50 | Custom dimensions available |
| Profile Types | Plain cover, Slotted (wiring duct), Round edge, Flexible | Different designs for different applications |
| Material | Rigid PVC (with stabilizers, flame retardants, pigments) | Halogen-free grades optional |
| Tensile Strength | ≥ 45 MPa | Impact-modified PVC available |
| Dielectric Strength | > 40 kV/mm | Excellent electrical insulation |
| Insulation Resistance | > 100 MΩ | Prevents current leakage |
| Service Temperature | -15°C to +60°C | Stable performance across range |
| Heat Distortion Temperature (HDT) | ≥ 60°C | Maintains shape under heat |
| Flame Retardancy | UL94 V-0 / V-1 (depending on grade) | Self-extinguishing material |
| UV Resistance | Optional (UV-stabilized PVC) | For outdoor applications |
| Moisture Resistance | Excellent, non-absorbent | Suitable for humid environments |
| Chemical Resistance | Resistant to acids, alkalis, most chemicals | Enhances durability |
| Surface Finish | Matte, glossy, textured | Based on customer preference |
| Colors | White, gray, black, or custom | Branding and aesthetic matching |
| Branding Options | Embossed logo, printed label, OEM/ODM | For global partnerships |
5. Customization Options at SW
As a specialized PVC trunking factory, SW provides both standard and customized specifications:
Custom sizes and dimensions according to project requirements
Color options (white, gray, black, or custom shades)
Surface finish (matte, glossy, or textured)
Logo embossing and brand labeling for OEM/ODM customers
Flame-retardant or UV-resistant grades for special environments
SW PVC trunking factory has customized PVC trunking for many well-known brands. We welcome you to learn about our PVC trunking manufacturing capabilities.
6. Applications of PVC Trunking
Residential: neat wiring for lighting and power cables
Commercial: structured cabling in offices, hotels, and retail stores
Industrial: control panels, machine wiring, and production lines
Infrastructure: hospitals, schools, airports, and data centers
Telecommunications: safe routing of fiber optic and LAN cables
understanding common specifications and technical parameters of PVC trunking
When selecting PVC trunking, understanding common specifications and technical parameters ensures the right choice for your project. From size and profile to flame-retardancy and UV stability, every detail contributes to the safety and efficiency of your wiring system.
With 20 years of expertise as a PVC trunking factory, SW offers high-quality, customizable, and certified trunking solutions trusted by brands worldwide. Whether you need standard profiles or fully customized OEM/ODM products, SW is your reliable partner in PVC trunking manufacturing.
We have a PVC trunking factory of skilled engineers ready to support you in your product development journey from idea design to production.Any ideas about your product you can contact us freely,and our engineers will get back to you with a quote asap. Whatsapp +86 188 2072 7151
Who is Shuowei?
Since 2006, Shuowei is a professional extrusion profiles factory based in Guangdong, China. There are total about 51-100 people in our office. Shuowei PVC extrusion factory is committed to the design and production of extruded profiles, such as PVC pipes, PE trunking, PVC skirting line. Since its inception, we have won the wide recognition of the market and the deep trust of customers with our ingenious design, exquisite technology and the ultimate pursuit of quality.
Are you a manufacturer or a trader?
We are a Chinese top PVC extrusion profiles manufacturer and our factory is located in Huizhou. Our factory has a 16,000㎡ production base, 5+ automated extrusion profiles production lines, an annual production capacity of 30,000 tons, and serves more than 500 customers worldwide. Welcome to visit our factory!
What is your product range?
We pecialize in the design and production of high quality extrusion profiles,such as PVC pipe, ABS extrusion, PC lampshades, PVC skirting lines, PP trunking, PE profiles…
How long does the custom development process take?
We support custom extrusion products. The usual process has 4 steps: demand confirmation → 3D design/proofing → test certification → mass production (cycle 3-8 weeks).
Do you have any international certifications?
We have passed ISO 9001, CE, RoHS, SGS and other certifications, and meet the mainstream standards of Europe, America, the Middle East and Asia
