CMI Practice Questions - Certified Master Inspector (CMI) Exam

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A CMI observes that the gas piping inside a residence is not bonded to the electrical grounding system. According to NEC 250.104(B), this is a deficiency because:

Interior metal gas piping can reach a dangerous voltage potential in a fault condition without bonding, creating an electrocution risk Gas piping must be bonded to prevent static discharge from the gas flow Bonding equalizes gas pressure throughout the distribution system NEC 250.104(B) only applies to exterior gas piping, so interior piping has no bonding requirement

Correct Answer:

Interior metal gas piping can reach a dangerous voltage potential in a fault condition without bonding, creating an electrocution risk

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