Core TradesCâu 78 / 700
In a typical dwelling, the interior metal water piping and the metal gas piping are required to be:
a.Left ungrounded to avoid corrosion
b.Connected only to the water heater
c.Insulated from the electrical system
d.Bonded to the electrical grounding system to keep them at the same potential
Giải thích
Metal water and gas piping systems that may become energized must be bonded to the service grounding system so that all metal parts stay at the same potential, reducing shock and arcing risk if a fault energizes the piping. Leaving them ungrounded or insulated defeats this safety function.
Trích dẫn luật: 2025 CA Electrical Code (based on NEC)Luyện miễn phí toàn bộ 700 câu hỏi — không cần đăng ký.
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