What must be included in double-gang boxes containing 120-volt receptacles and TV outlets?

In installations where double-gang boxes are used to contain 120-volt receptacles and TV outlets, it is essential to include a barrier to properly separate the different types of outlets. This barrier ensures that there is no interference between the electrical components, particularly between the power circuits and the low-voltage circuits used for television signals.

The separation provided by the barrier helps to prevent any potential issues such as signal degradation or interference that could arise if the electrical and television wiring were to come into direct contact. This practice is also aligned with safety standards and regulations, which aim to reduce the risk of electrical hazards in residential wiring.

In contrast, a fuse, switch, or cover plate have different purposes. A fuse is typically used for overcurrent protection and is not a standard requirement for double-gang boxes. A switch is used to control electrical devices but does not address the need for separation between different types of outlets in a double-gang box. A cover plate is important for safety and aesthetic reasons, but it does not prevent interference between wiring types or ensure compliance with electrical codes regarding separation.