Understanding Conductor Classes: Class 1 to Class 6 Explained
Electrical conductors are the backbone of countless electrical systems, from industrial machinery to building installations. One of the most important ways conductors are classified is by flexibility, defined in classes ranging from Class 1 to Class 6.
If you’ve seen references to Class 1, Class 5, or Class 6 conductors and wondered what they mean, this short, technical article breaks it down in simple terms, showing you where each is typically used and why our flagship Class 6 products offer exceptional performance.
What Are Conductor Classes?
Conductor classes are defined by international standards (such as IEC 60228). They indicate how flexible or rigid a conductor is, based on the number and thickness of the strands that make it up.
- Lower classes (like Class 1) are more rigid.
- Higher classes (like Class 6) are highly flexible.
The right class depends on the application, installation environment, and movement required.
Class-by-Class Overview (Classes 1 to 6)
Class 1 – Solid Conductors
- Description: Made from a single solid wire.
- Flexibility: Very low – completely rigid.
- Common Uses: Fixed wiring in buildings, power distribution boards, and installations where the cable will not be moved after installation.
Class 2 – Rigid Stranded Conductors
- Description: Made from multiple thicker strands twisted together.
- Flexibility: Low – slightly more flexible than Class 1 but still rigid.
- Common Uses: Fixed installations in buildings, distribution boards, and industrial equipment.
Class 5 – Flexible Conductors
- Description: Made from finer strands for improved flexibility.
- Flexibility: Medium – can be bent and routed more easily.
- Common Uses: Machinery wiring, control panels, marine applications, and general-purpose flexible cabling where reliability and ease of installation are important.
Class 6 – Extra Flexible Conductors
- Description: Made from a very large number of extremely fine strands.
- Flexibility: High – ideal for constant movement or tight installation spaces.
- Common Uses: Moving equipment, temporary power distribution, portable and moveable devices, panel wiring.
Why Class 6 is a Flagship Choice
Our flagship products are predominantly Class 6 conductors, chosen for their ability to perform reliably in applications where flexibility, durability, and efficient use of space are essential.
The very fine stranding of Class 6 conductors allows cables to be repeatedly handled, coiled, and reinstalled with ease. This makes them particularly well suited to environments where cables are regularly moved or repositioned, such as the temporary power industry, helping to reduce installation effort and minimise stress on the conductor during use.
In more compact installations, such as panels, control systems, and containerised equipment, the flexibility of Class 6 conductors enables easier routing, tighter bend radius, and neater cable management. This not only simplifies installation but also helps optimise space, making it easier to design efficient layouts without compromising accessibility or performance.
Overall, Class 6 conductors offer a combination of flexibility and practicality that supports both dynamic and space-constrained applications, making them a trusted choice across a wide range of industries.
While Class 6 provides the highest level of flexibility, Class 5 conductors remain an excellent and widely used solution. They offer strong performance for many applications where flexibility is required but extreme movement or tight space constraints are not the primary concern. Class 5 conductors are commonly used in machinery, control systems, and specialist applications such as marine environments. A lot of our Marine range of cables feature a Class 5 conductor, where the balance of flexibility, robustness, and reliability makes them a proven and dependable option.
In Summary
Class 1: Solid conductors – rigid and best suited to fixed installations where no movement is expected.
Class 2: Rigid stranded conductors – slightly more flexible than solid conductors, commonly used in fixed industrial and building installations.
Class 5: Flexible conductors – a versatile and widely used option, offering a strong balance of flexibility and durability for machinery, control, marine, and general industrial applications.
Class 6: Extra flexible conductors – designed for applications where repeated handling, ease of installation, and efficient use of space are critical, making them ideal for dynamic and compact environments.
Selecting the right conductor class helps ensure reliable performance, easier installation, and long service life. By understanding the differences between conductor classes, you can choose the most suitable solution for your application—whether it requires robustness, flexibility, or a combination of both.
