Electrician Red Seal · Question
A Red Seal electrician is setting up temporary power for a construction site. The main temporary service is a 100 A, 208 V, 3-phase, 4-wire system. The bonding conductor for the system will be bare copper. What is the minimum size of the bare copper bonding conductor required for this temporary service according to the Canadian Electrical Code (CEC)?
CEC Table 16 specifies the minimum size of bonding conductors based on the rating or setting of the overcurrent device ahead of the service or feeder. For a 100
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Question: A Red Seal electrician is setting up temporary power for a construction site. The main temporary service is a 100 A, 208 V, 3-phase, 4-wire system. The bonding conductor for the system will be bare copper. What is the minimum size of the bare copper bonding conductor required for this temporary service according to the Canadian Electrical Code (CEC)?
Answer options: ✅ 8 AWG copper
- 6 AWG copper
- 4 AWG copper
- 10 AWG copper
Correct answer: 8 AWG copper
Explanation: CEC Table 16 specifies the minimum size of bonding conductors based on the rating or setting of the overcurrent device ahead of the service or feeder. For a 100 A service, Table 16 indicates a minimum bonding conductor size of 8 AWG copper. This ensures adequate fault current capacity for safety.
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