Which of the following is the correct way the NEC identifies changes from the previous edition?

The National Electrical Code (NEC) employs a specific method to identify changes made in new editions. This method ensures that readers can easily spot modifications or updates compared to previous editions. One of the ways the NEC indicates these changes is through the application of gray shading and brackets in the text. This visual cue highlights revised sections, making them easily identifiable to users reviewing the code.

By using gray shading and brackets, the NEC provides a clear and standardized approach that facilitates the review process for electricians, inspectors, and other professionals who rely on this important reference. This method promotes clarity and efficiency when navigating updates within the document, which is crucial for maintaining safety and compliance in electrical installations.