Electrician Red Seal · Question
A journeyperson is installing a recessed luminaire in a combustible ceiling space. The luminaire is marked 'IC' and is rated for Type NMD90 cable. What is the minimum free conductor length that must be supplied for making connections to the luminaire's junction box within the ceiling space?
Rule 12-3022(3) of the CEC specifies that a minimum length of 150 mm (6 in.) of free conductor must be provided at all outlets and switch boxes. However, for a
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Question: A journeyperson is installing a recessed luminaire in a combustible ceiling space. The luminaire is marked 'IC' and is rated for Type NMD90 cable. What is the minimum free conductor length that must be supplied for making connections to the luminaire's junction box within the ceiling space?
Answer options:
- 150 mm (6 in.)
- 200 mm (8 in.) ✅ 100 mm (4 in.)
- 300 mm (12 in.)
Correct answer: 100 mm (4 in.)
Explanation: Rule 12-3022(3) of the CEC specifies that a minimum length of 150 mm (6 in.) of free conductor must be provided at all outlets and switch boxes. However, for a luminaire's integral junction box, Rule 30-308(3) states that there shall be at least 100 mm (4 in.) of free conductor for making connections. 150 mm is required for standard outlet/switch boxes.
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