Electrician Red Seal · Question
A Red Seal electrician is inspecting an existing commercial building. They observe a section of exposed NMD90 cable supplying a fluorescent lighting fixture. The cable is run along the surface of a drywall ceiling in a public corridor. Which of the following statements is true according to the Canadian Electrical Code (CEC)?
CEC Rule 12-3000 states that non-metallic-sheathed cable (NMD90) shall not be used in commercial occupancies, except where installed in a finished wall or ceili
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Question: A Red Seal electrician is inspecting an existing commercial building. They observe a section of exposed NMD90 cable supplying a fluorescent lighting fixture. The cable is run along the surface of a drywall ceiling in a public corridor. Which of the following statements is true according to the Canadian Electrical Code (CEC)?
Answer options: ✅ This installation is a violation because NMD90 cable is not permitted to be exposed in commercial buildings.
- This installation is acceptable if the cable is mechanically protected from damage.
- NMD90 cable is only permitted exposed in residential occupancies.
- Exposed NMD90 cable is permitted in commercial buildings if it is above 2.5 metres (8.2 feet) from the floor.
Correct answer: This installation is a violation because NMD90 cable is not permitted to be exposed in commercial buildings.
Explanation: CEC Rule 12-3000 states that non-metallic-sheathed cable (NMD90) shall not be used in commercial occupancies, except where installed in a finished wall or ceiling when enclosing in plaster, concrete, or similar infill material. Exposed NMD90 in a commercial public corridor is a violation of this rule.
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