Fire Alarm System Wiring Methods

Nfpa 70 national electric code article 760 covers the equipment and wiring of the fire alarm system both power to the control console and zone wiring to initiating devices and to annunciators as well as any phone lines for automatic calling.

Fire alarm system wiring methods. Cable splices or terminations shall be made in listed fittings boxes enclosures fire alarm devices or utilization equipment. In our basic wiring diagram a single or multiple heat and smoke detectors are installed in the home by connecting the live line or hot neutral ground and an interconnected wire to the alarm. 760 130 wiring methods and materials on load side of the plfa power source. Variety of fire alarm installation wiring diagram.

It reveals the elements of the circuit as simplified forms and the power and signal connections between the devices. Collection of fire alarm wiring diagram pdf. Wiring methods and materials on the load side of the power limited power source are covered in 760 130 a and b. Fire alarm systems include fire detection and alarm notification voice communications guard s tour sprinkler water flow and sprinkler supervisory systems 760 1 fpn 1.

The environment into which fire alarm wiring is installed determines the specific type and rating of the cable or wiring to be used. A smoke or heat detector can be installed to the existing or new home wiring. Smoke alarms can be part of an addressable fire alarm system. Wiring methods for power limited fire alarm circuits power limited fire alarm circuits shall be installed in accordance with nec article 760 46 and conductors shall be solid or stranded copper.

When applying most articles in chapters 5 through 8 chapter 3 wiring methods apply except as noted. Chapter 3 in reverse. B plfa wiring methods and materials. A wiring diagram is a streamlined traditional photographic depiction of an electric circuit.

The exception is the newer addressable fire alarm systems which utilize better designed sensing equipment and more reliable fire detection devices. 24 hours standby followed by 15 minutes of alarm where an engine driven generator is used to provide secondary power a minimum of blank hours of batteries are required. This is the basic fire alarm system used in household wiring. Also included are other fire alarm functions such as guard s tour sprinkler waterflow sprinkler supervisory equipment elevator capture and shutdown door release smoke doors and damper control fire doors and fan shutdown only where these.

A wiring diagram is a simplified conventional pictorial depiction of an electrical circuit. It shows the parts of the circuit as streamlined shapes as well as the power as well as signal connections in between the gadgets.