Penetrations and holes resulting from removal of conduit or popping shall be sealed with which method?

• A. Fire-rated putty
• B. Listed liquid tight sealing devices
• C. Electrical tape
• D. Concrete plugs

Answer: (B)

Penetrations created by removing conduit or causing a hole must be sealed with devices that are recognized and tested for that specific purpose. Listed liquid-tight sealing devices are designed to restore the enclosure’s protective barrier around conductors, providing a reliable liquid-tight seal and preserving the assembly’s listed performance. This ensures moisture resistance and maintains compliance with electrical and fire-stop requirements, which is essential in environments exposed to heat, oil, or moisture.

Other methods don’t provide the same guaranteed performance: fire-rated putty helps with fire resistance but doesn’t guarantee a liquid-tight, listed seal around a conduit; electrical tape isn’t a durable, code-approved seal for penetrations; concrete plugs are not universally applicable and don’t maintain the required listing for all wall types or penetrations.