Control cables increasingly have to withstand temperature extremes in applications such as food and beverage machines, industrial ovens, furnaces, foundries, and industrial process equipment. These applications can subject the cable to continuous-use temperatures as low as &#;50°C and as high as 180°C.
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For these environmental conditions, customers have to think about cables with jacket materials other than PVC. A growing class of control cables occupies a middle ground between over-engineered specialty cables and commodity PVC cables. Silicone or cross-linked polyolefin copolymers can take over in thermal environments that would cause PVC cables to fail prematurely. Here&#;s a closer look at these cables, and in particular, how they balance thermal performance against other desirable cable properties.
Improving the thermal performance of a control cable can be a balancing act. Some of the changes to cable construction that widen the operating temperature range can compromise the cable&#;s electrical or mechanical properties. Silicone and cross-linked polyolefin cables do a good job striking that balance.
Both materials dramatically widen the continuous use temperature range of control cables. A typical PVC control cable, for instance, can function in a temperature range from &#;40 to 90°C. While a silicone-based cables work comfortably in a range from &#;50 to +180°C.
The conductor material is also an important factor. For higher temperatures, a coated conductor is necessary in order to protect the bare copper effectively against corrosion. Tinned copper conductors should be used within a cable with a jacket made of silicone or cross-linked polyolefin.
Whether you're setting up a new electrical system or need to replace existing cables, understanding the different types of wires is crucial. You&#;ll need to consider what the cable is being used for and the risks and limitations of that cable, conductor and insulation material. You&#;ll also find the installation method can influence the performance, limitations, and rating.
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An electrical wire is the electro technical component used to transport electricity to transmit energy and information. It&#;s made of a conductive material, single or multiple strands, often surrounded by insulating material. The inside of the electrical wire is called the &#;core&#;, which can be solid or stranded and often insulated with PVC. Flex is an abbreviation for Flexible Cable, meaning a cable that can flex repeatably, and is usually made up of multiple strands of wire. It&#;s a type of cable that is often used for connecting appliances to the mains.
Electrical cables have accreditations and standards that must be met. These verify that the design, electrical, mechanical, and material properties, as well as any specialist performance, meet the requirements outlined in all the standards that ensure they&#;re safe.
Mains cable colours are standardised across Europe and the UK, so they comply with international and British standards. Brown wires are live, blue wires are neutral, and green/yellow wires are the earth wires.
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