When can equipment be installed in areas without drainage?

The correct answer indicates that equipment can be installed in areas without drainage when it is specifically rated for submersion. Equipment that is designed to be submerged has been tested and proven to operate safely under such conditions. This rating ensures that the components can withstand potential water exposure without failure or risk of electric shock, which is particularly crucial in environments prone to flooding or water accumulation.

Equipment rated for submersion typically has features such as sealed enclosures and corrosion-resistant materials, allowing it to maintain functionality in wet conditions. This designation is also aligned with the NEC's focus on safety, as it addresses the risks involved with water and electricity.

Other types of installations may involve specific conditions or additional measures, such as the presence of drainage or water management strategies. However, for the type of installation in question, having an appropriate submersion rating is the primary requirement that ensures compliance with safety standards and protects from electrical hazards.