Electrician Red Seal · Question
During an inspection of a newly installed data centre, it's observed that communication cables are run in the same tray as 600 V power conductors. The communication cables are rated for 300 V. According to CEC Rule 12-904, what action is required to ensure compliance?
CEC Rule 12-904(1)(b) states that communication and power cables operating at over 300 V shall not be installed in the same cable tray without a barrier of shee
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Question: During an inspection of a newly installed data centre, it's observed that communication cables are run in the same tray as 600 V power conductors. The communication cables are rated for 300 V. According to CEC Rule 12-904, what action is required to ensure compliance?
Answer options:
- No action is required as long as the trays are separated by at least 150 mm (6 in.).
- The communication cables must be moved to a separate cable tray. ✅ A barrier ofsheet steel or other approved material must be installed for the full length of the tray.
- Install higher voltage rated communication cables.
Correct answer: A barrier ofsheet steel or other approved material must be installed for the full length of the tray.
Explanation: CEC Rule 12-904(1)(b) states that communication and power cables operating at over 300 V shall not be installed in the same cable tray without a barrier of sheet steel or other approved material that is at least equivalent to the width of the tray.
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