Electrician Red Seal · Question
An electrician is upgrading the lighting in a commercial office space. The existing non-metallic outlet boxes are installed in fire-rated walls. What is a key consideration from the Canadian Electrical Code (CEC) regarding replacing these boxes?
Rule 24-106(6) of the CEC stipulates that outlet boxes installed in fire-rated assemblies must be specifically listed for such application to maintain the integ
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Question: An electrician is upgrading the lighting in a commercial office space. The existing non-metallic outlet boxes are installed in fire-rated walls. What is a key consideration from the Canadian Electrical Code (CEC) regarding replacing these boxes?
Answer options:
- Non-metallic boxes are prohibited in fire-rated assemblies. ✅ The replacement boxes must be listed for use in fire-rated assemblies.
- The box volume must be increased by 20% for fire-rated walls.
- A steel box must be used, regardless of its listing.
Correct answer: The replacement boxes must be listed for use in fire-rated assemblies.
Explanation: Rule 24-106(6) of the CEC stipulates that outlet boxes installed in fire-rated assemblies must be specifically listed for such application to maintain the integrity of the fire rating. It is not about the material (metallic vs. non-metallic) itself, but the listing.
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