The role of PVC Wiring Ducts and the method of verifying the flame retardant effect of PVC Wiring Ducts
The main functions of PVC Wiring Ducts can be summarized as follows:
1) Standardize and organize lines:
PVC Wiring Ducts can effectively organize different types of lines in one place, making it easier to view the lines. For electricians, if they need to repair or replace lines, they can find the target more quickly, which improves work efficiency and makes wiring more convenient and neat.
2) Protect lines from damage:
PVC Wiring Ducts has the characteristics of flame retardancy and insulation, which can protect lines. Even if there is a fire, it can extinguish itself, avoiding damage to multiple circuits and increasing the safety of the lines.
3) Extend the service life of wires:
In the power industry, the use time of wires in lines using PVC Wiring Ducts is longer than that of lines directly exposed to the outside. Even if it is hit, it can reduce the damage of wires, thereby extending the service life of wires.
Methods for verifying the flame retardant effect of PVC Wiring Ducts
1) Flame retardant grade:
The flame retardant grade of PVC Wiring Ducts usually follows the UL94 standard, which evaluates the ability of plastic materials to extinguish after being ignited. The flame retardant grades are HB, V2, V1, and V0 from low to high. Among them, the flame retardant effect of V0 grade is the best, the flame will be extinguished within 30 seconds and no burning materials can fall.
2) Combustion characteristics:
Through flame test and smoke density test, the flame propagation rate of PVC materials during combustion and the density of harmful gases and smoke generated are evaluated.
3) Flame retardant content:
Detect the content of flame retardant in the sample to determine its contribution to the flame retardant process.
4) Physical properties:
Test the physical properties of the material such as tensile properties and bending properties to determine the toughness and flame retardancy of the material.
5) Certification standards:
Check whether the PVC Wiring Ducts has passed the relevant flame retardant certifications, such as UL94-V0, ROHS and CE certifications, etc. These products with complete certifications are more reliable.
6) Material quality:
High-quality PVC Wiring Ducts should be made of new materials, while poor-quality cable trunking may use recycled materials, which have poor toughness and are easy to break.
7) Appearance inspection:
Check whether there are obvious impurities in the wire duct, as well as the thickness of the wire duct, which can simply judge the quality.
8) Actual test:
Conduct vertical burning test, horizontal burning test and other methods to evaluate the flame retardant level of the material.
