Openings around electrical penetrations into fire-resistant-rated walls shall _____ to maintain the fire-resistance rating.

The requirement to firestop openings around electrical penetrations into fire-resistant-rated walls is crucial for maintaining the fire-resistance rating of those walls. Firestopping is designed to prevent the spread of fire and smoke through openings in fire-rated assemblies, which is essential for life safety and to meet building codes.

Using approved firestop methods ensures that the materials and installation practices have been tested and certified to provide the necessary resistance to fire. This could involve a variety of materials such as intumescent caulks, firestop pillows, or other specialized products that expand when exposed to heat, effectively sealing the penetration.

While insulating, sealing with foam, or covering with drywall could contribute to overall fire safety, they do not specifically meet the criteria set forth by the National Electrical Code and fire safety standards regarding maintaining fire-resistance ratings. Simply insulating or covering openings may not adequately prevent fire and smoke from passing through, which is the primary purpose of firestopping techniques. Hence, adhering to the specified firestop methods is essential for compliance with safety standards and maintaining the integrity of fire-rated walls.