Which of the following protects cables from weather conditions?

The lead sheath is designed to protect cables from various environmental factors, including moisture, chemicals, and extreme temperatures. Lead is a dense and malleable metal that effectively shields the inner conductors from water infiltration, which is particularly important in outdoor applications or areas with high humidity. This protection helps in maintaining the integrity and performance of the cables over time, reducing the risk of failures due to weather-related wear and tear.

In contrast, while other options such as plastic jacket, rubber coating, and fiberglass sheath offer some degree of protection, they may not provide the same level of durability and weather resistance that a lead sheath can provide. Plastic jackets are often used for insulation but can degrade in harsh conditions, rubber coatings may provide flexibility and some water resistance, and fiberglass sheaths are typically used for reinforcing structural integrity rather than direct weather protection.