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The scope must be thoroughly reviewed before applying the National Electrical Code (NEC) to determine compliance requirements because it outlines the specific areas, contexts, and types of installations that the code pertains to. Understanding the scope provides the foundational knowledge necessary to assess which parts of the NEC are relevant to a particular project. This ensures that the application of the NEC is appropriate and addresses all critical aspects related to safety, performance, and compliance.

Reviewing the scope helps identify whether the project falls within the jurisdiction of the NEC and informs which requirements must be met based on the nature of the electrical installation. Without this initial review, applying the NEC could lead to oversight of critical compliance issues that are specific to the project's context, potentially jeopardizing safety and regulatory compliance.