Which type of cable is suitable for direct burial applications?

The suitability of a cable for direct burial applications is primarily determined by its ability to withstand moisture, soil chemicals, and physical pressure while ensuring reliable performance underground. In this context, the PSAP (Polyethylene, Steel core, Aluminum, Polyethylene) cable is particularly appropriate.

PSAP cables are designed with materials that are resistant to water ingress and can endure the harsh environmental conditions found in underground installations. The outer polyethylene layer provides a waterproof barrier, while the aluminum and steel components contribute to the cable's strength and resistance to crushing forces, which are common in burial scenarios.

In contrast, the other types of cables mentioned may not meet the necessary specifications for direct burial. For example, fiber optic cables can be designed for direct burial, but they require specific protective coatings and are often more sensitive to kinks and sharp bends than PSAP cables. Coaxial cables and twisted pair cables generally do not have the same level of environmental protection and strength required for direct burial without additional protective measures.

Understanding the environmental challenges and physical demands of direct burial installations helps clarify why the PSAP cable is a superior choice for this application.