Electrician Red Seal · Question
A Red Seal electrician is extending a circuit for a new light fixture in an existing wood-frame wall. There is no existing conduit, and the building is residential. The most practical and CEC-compliant wiring method for this extension, assuming the wall cavity is dry, would be:
Non-metallic Sheathed Cable (NMD90) is the most common and practical wiring method for residential wood-frame construction for extensions in dry wall cavities.
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Question: A Red Seal electrician is extending a circuit for a new light fixture in an existing wood-frame wall. There is no existing conduit, and the building is residential. The most practical and CEC-compliant wiring method for this extension, assuming the wall cavity is dry, would be:
Answer options:
- Rigid Non-metallic Conduit (RNMC)
- Electrical Metallic Tubing (EMT) ✅ Non-metallic Sheathed Cable (NMD90)
- Metal Clad Cable (MC90)
Correct answer: Non-metallic Sheathed Cable (NMD90)
Explanation: Non-metallic Sheathed Cable (NMD90) is the most common and practical wiring method for residential wood-frame construction for extensions in dry wall cavities. It is permissible by CEC in these applications due to its flexibility and ease of installation.
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