Electrician Red Seal · Question
What is the requirement for bonding a metallic gas pipe entering a building?
CEC Rule 10-408 allows bonding of metallic gas piping but Rule 10-700 explicitly prohibits using a gas pipe as a grounding electrode. The main takeaway is that
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Question: What is the requirement for bonding a metallic gas pipe entering a building?
Answer options:
- It must be bonded to the neutral at the main panel. ✅ It should never be used as a grounding electrode.
- It does not require bonding if it is painted.
- It must be bonded with a No. 10 AWG copper conductor.
Correct answer: It should never be used as a grounding electrode.
Explanation: CEC Rule 10-408 allows bonding of metallic gas piping but Rule 10-700 explicitly prohibits using a gas pipe as a grounding electrode. The main takeaway is that while it is bonded for safety to equalize potential, it cannot be the connection to earth for the electrical system.
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