What kind of cable is recommended for underground installations?

Direct burial cable is specifically designed for underground installations due to its construction, which employs materials that provide protection against moisture and soil corrosion. This type of cable is typically constructed with a thicker, more durable insulation and often includes a water-blocking feature that prevents moisture from penetrating the cable, thereby safeguarding the conductors inside.

In contrast, standard insulated cable may not have the necessary resistance to moisture and environmental factors that underground installations encounter. Type NM (non-metallic) cable is intended for dry locations and is not rated for direct exposure to the elements, making it unsuitable for underground use. Type AC (armored cable) is also not intended for direct burial and is mainly designed for above-ground applications, where it can be protected from physical damage.

Choosing the appropriate cable for underground installations is crucial to ensure safety and reliability over time, making direct burial cable the clear choice in this scenario.