Services & Distribution第 48 / 110 题
An emergency system must be capable of supplying power to its loads within what maximum time after normal supply is lost?
a.60 seconds
b.30 seconds
c.120 seconds
d.10 seconds
解析
Emergency systems must restore power to life-safety loads within 10 seconds of loss of the normal source.
法律依据: 2023 NEC 700.12免费刷完整 110 道题库 — 无需注册。
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