Gas Piping第 92 / 120 题
A corrugated stainless steel tubing (CSST) gas system is installed in a two-story house. What is the minimum size of the copper bonding jumper used to bond the CSST system to the electrical service grounding electrode system?
a.14 AWG
b.12 AWG
c.6 AWG
d.10 AWG
解析
CSST that is not listed as arc-resistant jacketed must be directly bonded with a jumper no smaller than 6 AWG copper, connected to a rigid metallic component of the gas piping upstream of the first CSST fitting. Smaller conductors such as 14, 12 or 10 AWG cannot reliably carry lightning-induced energy and would not satisfy the bonding requirement.
法律依据: IFGC §310免费刷完整 120 道题库 — 无需注册。
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