Standard for Installation of Fire Safety Devices based on Use and Occupancy Article 177

Emergency lighting equipments shall be connected to emergency power source.Battery shall be used for the above-mentioned emergency power source, and the capacity of battery shall enable the equipment to work for at least 30minutes. Where both the battery and emergency generator have been employed, the capacity shall enable the equipment for work for at least 10 minutes and 30 minutes respectively.
中文原文 各類場所消防安全設備設置標準第177條
緊急照明設備應連接緊急電源。
前項緊急電源應使用蓄電池設備,其容量應能使其持續動作三十分鐘以上。
但採蓄電池設備與緊急發電機併設方式時,其容量應能使其持續動作分別為十分鐘及三十分鐘以上。

English translation for reference only; the Chinese text prevails. Not legal advice.