If you are to install a new messenger supported wire, which of the following actions is NOT permitted?

When installing a new messenger-supported wire, it is crucial to understand the standards and best practices regarding wire support and installation. The option that is not permitted is to attach to a preexisting messenger wire if it is carrying the same type of system cabling. This is because using an existing messenger wire may compromise the structural integrity or electrical performance of both the new and existing installation. Each installation should be independent to ensure safety and compliance with electrical codes.

On the other hand, using a factory-assembled aerial cable adheres to safety standards and ensures reliability. Factory-assembled cables are tested for performance and can withstand environmental factors associated with outdoor installation. Using a messenger wire with field-installed lashing material is also acceptable, as long as it is done correctly to support the conductors adequately. Using wings and saddles for conductor support is permitted as they are designed to securely hold wiring in place, ensuring that the installation is stable and organized. Following these guidelines ensures that installations are compliant, safe, and reliable.