NFPA 70E Informative Annex M is titled Layering of Protective Clothing and Total System Arc Rating.

• A. Arc Rating and Protective Clothing
• B. Protective Clothing and Total System Arc Rating
• C. Layering of Protective Clothing and Total System Arc Rating
• D. Personal Safety and Protective Equipment

Answer: (C)

The key idea here is that this NFPA 70E Informative Annex brings together two related aspects of arc flash protection: how protective clothing is layered and how the protection of the entire system is evaluated with the Total System Arc Rating. Layering of Protective Clothing covers using multiple garments and barriers to achieve the needed arc protection while considering practicality and comfort. Total System Arc Rating refers to the combined protection provided by the clothing, accessories, and other PPE pieces as a complete system, not just individual fabrics. The best choice mirrors the actual title by including both parts, showing that the annex addresses both layering and the overall arc rating of the protective system. The other options omit one or both components or replace them with unrelated terms, so they don’t reflect the annex’s scope.