Why are they called shielded cables?
These are called shielded cables for a couple reasons. Initially, it refers to the fact that electromagnetic radiation is dampened. In fact, it should be completely blocked from leaving the inner and outer PVC layers. It is designed in this way for the simple reason that, if you are using this in an area where electromagnetic interference would be bad, those that block it well are the ones that are the best cables. This would also mean that they are going to be much more expensive. If you are hooking this up to equipment where signals are sent through, interference needs to be completely eliminated. Therefore, the shielded cables are referred to as such because they block electromagnetic signals. Want know more information or price of two core shielded cable, you can visit here.