Informational Notes in the NEC provide _________ type of information.

Informational Notes in the National Electrical Code (NEC) serve a crucial role in detailing additional guidance and explanations that enhance the understanding of the code’s provisions. These notes typically offer valuable design suggestions and reference material that help practitioners apply the NEC correctly and effectively.

The inclusion of these notes means that they provide insights that may not be strictly enforceable regulations but are essential for clarity and practical application. By fulfilling both the design suggestion aspect and serving as reference material, these Informational Notes help electrical professionals navigate the complexities of the code and ensure safety and compliance in electrical installations.

Thus, the correct answer encapsulates the full breadth of the purpose of Informational Notes, reflecting their dual function as both design aids and supportive reference material.