What can be utilized as a pulling line in a conduit lacking a pull line?

Using an unused cable already installed in a conduit as a pulling line is an effective solution because it allows for the leveraging of existing infrastructure. This method capitalizes on the fact that the installed cable can serve a dual purpose. It can act as a pull line to bring in new cables into the conduit without the need for additional materials or equipment. Because the cable is already there, it is typically strong enough to handle the stress of pulling, and it minimizes the risk of introducing additional resistance or complications into the conduit system.

When selecting an existing cable for this purpose, it is important to ensure that it is not currently being used for a critical function and that it is in good condition. This practice can save time and resources, as it avoids the necessity to install a dedicated pull line from scratch.

Other options like using a new pull line may seem practical, but if one isn't available, the installed cable effectively meets the requirement. Temporary rope and duct tape lines may not provide the necessary strength or reliability for pulling tasks, which underscores why utilizing an unused cable is a more suitable choice in this scenario.