Which type of cable is less affected by moisture due to its sealed nature?

The type of cable that is less affected by moisture due to its sealed nature is the oil and gas-filled cable. This type of cable contains a filling material that is either oil or gas, which helps to displace moisture and creates a barrier that significantly reduces the risk of water ingress. The oil or gas filling acts as a protective medium that not only helps maintain the integrity of the cable’s insulation but also prevents the development of corrosion and other moisture-related issues that can compromise the performance and safety of the cable over time.

In contrast, varnish-cambric cables and standard PVC cables are generally more susceptible to moisture infiltration because they do not have the same level of sealing as oil and gas-filled cables. While cross-linked polyethylene (XLPE) cable does provide good moisture resistance due to its chemical properties, it doesn't have the same protective filling mechanism that oil and gas-filled cables offer. Thus, the sealed nature and the moisture-repelling properties of oil and gas-filled cables make them particularly effective in environments where moisture exposure is a concern.