Electrician Red Seal · Question
During a commercial tenant improvement, an electrician needs to install a new lighting circuit in a suspended ceiling. The most suitable wiring method for this application, offering flexibility for future changes and ease of installation while meeting CEC requirements for concealed wiring in a dry location, would be:
Armoured cable (AC90 or BX) is a common and code-compliant wiring method for concealed, dry indoor locations like suspended ceilings due to its flexibility, eas
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Question: During a commercial tenant improvement, an electrician needs to install a new lighting circuit in a suspended ceiling. The most suitable wiring method for this application, offering flexibility for future changes and ease of installation while meeting CEC requirements for concealed wiring in a dry location, would be:
Answer options:
- Rigid Metal Conduit (RMC)
- Non-metallic sheathed cable (NMD90) ✅ Armoured cable (AC90 or BX)
- Electrical Non-metallic Tubing (ENT)
Correct answer: Armoured cable (AC90 or BX)
Explanation: Armoured cable (AC90 or BX) is a common and code-compliant wiring method for concealed, dry indoor locations like suspended ceilings due to its flexibility, ease of installation, and inherent mechanical protection. RMC is rigid and overkill for this application, NMD90 typically requires strapping every 1.5 m (5 ft) and is less flexible for future changes, and ENT is generally limited to specific applications such as concrete encasement (unless listed for other uses) or certain dry locations, but AC90 is more versatile here.
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