In practice, the purpose the shield is to conduct to ground any of the noise it has picked up. The cable shielding and its termination must provide a low-impedance path to ground. A shielded cable that is not grounded does not work effectively.Click to see full answer. Keeping this in view, do you ground both ends of a shielded cable?The cable shield works best when the signal lines are completely surrounded by a conductive “tunnel” that is completely at ground potential. That means it should be grounded at BOTH ends (grounded at one end means the other end is similar to an antenna at some frequencies).Additionally, what is the purpose of shielded wire? Shielded Cable: When To Use. This is why data and signal cables are usually protected with insulated conductors and wrapped with a conductive layer. Shielding reduces electrical noise and reduces its impact on signals and also lowers electromagnetic radiation. Shielding prevents crosstalk between cables near each other Herein, how do you ground a shielded cable? Signal cables The best way to wire shielded cables for screening is to ground the shield at both ends of the cable. Traditionally there existed a rule of thumb to ground the shield at one end only to avoid ground loops. Best practice is to ground at both ends, but there is a possibility of ground loops.What is shielding and grounding?Grounding means to connect electrical equipment to a common reference ground or earth. Shielding is used both for immunity (protecting against external interference) and emission (preventing interference to be radiated).