A cable tray is considered what type of penetration?

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Prepare for the Fire Alarm Technician Test. Study with flashcards and multiple-choice questions, each question provides hints and explanations. Get ready to ace your exam!

Multiple Choice

A cable tray is considered what type of penetration?

Explanation:
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.

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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