CCTV coax cable is constructed with a(n) ___ shield.

CCTV coax cable is commonly constructed with a copper shield due to its superior conductivity properties, which help in minimizing signal loss and interference. Copper is an effective material for shielding because it provides a good balance between weight and electrical conductivity, ensuring that the video signals transmitted through the coaxial cable maintain quality over longer distances.

While aluminum is occasionally used in coaxial cable construction, it does not offer the same level of conductivity and durability as copper. This makes copper the more favorable choice for reliable video surveillance and transmission applications, where maintaining signal integrity is crucial.

In some cases, the construction of coax cables may allow for both copper and aluminum shields depending on the specific design and required performance characteristics. However, when specifically seeking the best material for the shield of CCTV coax cable with regard to performance, copper is often preferred.