Final answer:
UF (Underground Feeder) cable is not allowed for above-ground installations. It can be buried directly in the ground and used in wet locations, but should not be submerged in water.
Step-by-step explanation:
The answer is c) Above-ground installations. UF (Underground Feeder) cable is specifically designed for underground use and it is not suitable for above-ground installations as it is not designed to withstand exposure to the elements and can become damaged or degraded. UF cable is also not allowed to be submerged in water as it is not designed to be waterproof. However, it can be buried directly in the ground and used in wet locations where it will not be exposed to water above the surface.