When an NM exposed cable passes through a floor, the cable is permitted to be protected by which wiring method?

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Prepare for the ICC Residential Electrical Inspector Level 1 exam with multiple choice questions, flashcards, and detailed explanations. Master your understanding of the residential electrical code to ensure success.

Multiple Choice

When an NM exposed cable passes through a floor, the cable is permitted to be protected by which wiring method?

Explanation:
Protecting NM cable where it passes through a floor requires a listed through-floor protection method. RTRC-XW is a listed protection system designed specifically for NM conductors going through floors, providing a rigid, durable path that guards the cable from nails, screws, and abrasion as it transitions between levels. The other options—EMT, FMC, or PVC conduit—are different protective raceways and aren’t the approved through-floor protection method in this situation.

Protecting NM cable where it passes through a floor requires a listed through-floor protection method. RTRC-XW is a listed protection system designed specifically for NM conductors going through floors, providing a rigid, durable path that guards the cable from nails, screws, and abrasion as it transitions between levels. The other options—EMT, FMC, or PVC conduit—are different protective raceways and aren’t the approved through-floor protection method in this situation.

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