Alerting techniques are located in NFPA 70E and are a form of protective equipment. Which categories apply to alerting techniques?

• A. I, II, III
• B. I, II, and IV
• C. II, III, and IV
• D. I, III, and IV

Answer: (B)

Alerting techniques are a way to warn and protect workers from electrical hazards, and NFPA 70E groups these techniques into specific categories that reflect the type and level of protection they provide. The applicable categories for alerting techniques are I, II, and IV, meaning these are the categories that cover the warning-based protective measures used in typical electrical work. Category III is not applicable to alerting techniques, as it relates to a different scope of protection not used for alerting devices. In practice, this means when you’re selecting or evaluating alerting methods, you should reference the categories I, II, and IV to ensure the technique aligns with the intended level of protection, rather than including category III. If you’re ever unsure, check the NFPA 70E section on alerting techniques for the exact category definitions.