Electrical · E-MTVCH

Typical Fire Alarm Riser Diagram

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This diagram outlines a typical fire alarm system architecture centered around a fire alarm control panel connected to a digital alarm communicator transmitter, remote annunciator, and telephone terminal board via specific conduit and wire configurations including three-quarter-inch conduit with CAT5e cables. The notification appliance circuits and signaling line circuits utilize three-quarter-inch conduit with shielded copper wire runs terminating at end-of-line resistors and ANSUL suppression interfaces. Power is supplied via a dedicated one-hundred-twenty-volt alternating current circuit using three-quarter-inch conduit with two number twelve copper THHN conductors and one number twelve copper ground wire. Installation notes specify class B style four point five signaling line circuits and class B style Y notification appliance circuits while prohibiting T-tapping. All work must comply with applicable codes, NFPA seventy-two requirements, and the authority having jurisdiction.

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