NV C-1A Boilers Practice Questions - Nevada C-1A Boilers Contractor Examination Exam

What is the general minimum cover for underground fuel-gas piping under NFPA 54 (2012) 7.1.2.1?

6 inches in all locations 36 inches under every lawn 48 inches because Nevada frost line is assumed statewide 12 inches, increased to 18 inches where external damage is likely

Correct Answer:

12 inches, increased to 18 inches where external damage is likely

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