Shielded vs Unshielded Wires — When to use each?
There are different kinds of wiring construction out there, and various shielding options are one of the main construction parts when it comes to cables. But what is the difference between shielded and unshielded cables? Keep reading to learn whether you should go for shielding or no shielding for your project.
Shielded cables
Shielded cables have a shield covering each individual wire, which is conductive. The shielding in wires is usually made of foil, copper tape, or metallic braids or may even come in a double-shielded option combining two types of material for extra protection. The layer of shield prevents the wire from electromagnetic interference (EMI) that interferes with signal transmission. In addition, shielding slightly enhances the cable’s ability to withstand mechanical damage.
Because the materials shielding is made of usually provide additional mechanical strength, shielded cables often lack flexibility and are difficult to bend and maneuver. Similarly, wiring with a shield is usually more expensive when compared to unshielded cables because of that extra layer of material. However, shielding provides the electrical system where the wire is installed with better defense from interference, hence ensuring better system performance.
Unshielded cables
Unshielded cables are wires that have no shield over the cable — instead, the individual wires are twisted as they are manufactured. Twisting the wires and helically wrapping them allows for making the cable less susceptible to malfunctions. Because there is no extra layer in the construction of unshielded wires, they are lighter and more flexible than the shielded ones, hence they are easier to install.
At the same time, wires with no shielding do not have as much protection from EMI as shielded wires do. Therefore, you can expect signal transmission interference with unshielded wires. Still, they are a less expensive wiring choice between the two and can be a great choice for some simple applications.
Shielded vs. unshielded wires
As you can see, each type of wiring has its advantages and disadvantages. Here is a comparison between shielded and unshielded wires:
Shielded
Better protection against EMI
Better electrical system performance
Better for outdoor environment
Costly
Thick and lack flexibility
Unshielded
Poor performance with EMI
Faster signal transmission (with no EMI)
Better for indoor environment
Less expensive
Thinner and easier to install
How to choose between shielded and unshielded cables?
Now that you know the difference between shielded and unshielded cables, as well as their pros and cons, you can choose a wire with the right shielding for your project. Go to any professional electric wire store, like Nassau National Cable, and check out the catalog to find the cable you need. Feel free to consult the store’s team in case you need any assistance in product selection.
