A cable tray is considered what type of penetration?

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Study for the Fire Alarm Lesson 5and6 Test. Prepare with flashcards and multiple choice questions; each question comes with hints and explanations. Gear up for success on your exam!

Multiple Choice

A cable tray is considered what type of penetration?

Dynamic penetrations are those that may move or shift within a fire‑rated assembly. A cable tray can experience movement from vibration, thermal expansion, or building movement, so the opening it creates isn’t fixed in place. Firestop systems for dynamic penetrations are designed to accommodate that movement and maintain fire resistance. Static penetrations would imply no movement, which isn’t the case here, and incidental or external aren’t the classifications used for this context.

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