Electrician Red Seal · Question
An industrial facility requires a 400 A service. The supply conductors are aluminum. According to CEC Table 17, what is the minimum size of aluminum bonding conductor required for the grounding electrode system?
For an overcurrent device rating of 400 A, and using aluminum conductors for the bonding conductor, CEC Table 17 specifies a minimum size of No. 3/0 AWG. This e
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Question: An industrial facility requires a 400 A service. The supply conductors are aluminum. According to CEC Table 17, what is the minimum size of aluminum bonding conductor required for the grounding electrode system?
Answer options:
- No. 2 AWG
- No. 1/0 AWG ✅ No. 3/0 AWG
- No. 250 kcmil
Correct answer: No. 3/0 AWG
Explanation: For an overcurrent device rating of 400 A, and using aluminum conductors for the bonding conductor, CEC Table 17 specifies a minimum size of No. 3/0 AWG. This ensures adequate capacity for fault currents.
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