Electrician Red Seal · Question
A control panel for an industrial motor is being connected to a junction box mounted on a machine, which vibrates significantly. The conduit run is approximately 1 m (3.3 ft.). Which wiring method is best suited for this application to accommodate the vibration while maintaining electrical continuity?
Liquid-tight flexible metal conduit (LFMC) is designed to provide protection against moisture, vapours, and dust, and its flexibility makes it ideal for connect
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Question: A control panel for an industrial motor is being connected to a junction box mounted on a machine, which vibrates significantly. The conduit run is approximately 1 m (3.3 ft.). Which wiring method is best suited for this application to accommodate the vibration while maintaining electrical continuity?
Answer options:
- EMT with set-screw couplings.
- PVC conduit with glued fittings. ✅ Liquid-tight flexible metal conduit (LFMC).
- Rigid metal conduit (RMC) with threaded fittings.
Correct answer: Liquid-tight flexible metal conduit (LFMC).
Explanation: Liquid-tight flexible metal conduit (LFMC) is designed to provide protection against moisture, vapours, and dust, and its flexibility makes it ideal for connections to vibrating equipment or where movement is expected. Rigid conduits like EMT, PVC, and RMC are too rigid for vibrating applications.
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