Electrician Red Seal · Question
An electrician is tasked with bonding a new, non-current-carrying metal exhaust fan housing in a hazardous location (Class I, Division 2). The fan is rated for 240 V, 3-phase, 10 A. What is the minimum size copper bonding conductor required for this application?
The minimum size bonding conductor for equipment is determined by the rating of the overcurrent device protecting the circuit. For a 10 A motor, the overcurrent
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Question: An electrician is tasked with bonding a new, non-current-carrying metal exhaust fan housing in a hazardous location (Class I, Division 2). The fan is rated for 240 V, 3-phase, 10 A. What is the minimum size copper bonding conductor required for this application?
Answer options:
- #14 AWG
- #12 AWG ✅ #10 AWG
- #8 AWG
Correct answer: #10 AWG
Explanation: The minimum size bonding conductor for equipment is determined by the rating of the overcurrent device protecting the circuit. For a 10 A motor, the overcurrent device protecting the feeder/branch circuit would typically be 15 A or 20 A. According to CEC Table 16, a 20 A overcurrent device requires a minimum #10 AWG copper bonding conductor. Hazard location requirements may necessitate specific wiring methods but not larger bonding conductor sizes unless otherwise specified.
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