Life Safety Code Handbook

Life Safety Code Handbook

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quantity of devices on a given floor might be such that NFPA 72 requires a Style D or E if all the devices are to be on the same circuit. Alternatively, the ... See Chapter 7 of the Life Safety Code for more information on these circuits. NFPA 72 ... These devices are often referred to as two-wire or zone-powered detectors.

Title:Life Safety Code Handbook
Publisher: - 1991


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