Wiring Diagram For Class B Fire Alarm. The fire alarm diagram can be seen in the figure above. The current as it leaves the panel goes out one of a pair of wires goes through a current limiting resistor called an end of line resistor eol.
Basically when the fire alarm panel detects an open wire in the class a loop it automatically switches to using two separate un supervised class b loops. Class b wiring is supervised it is continually checked for continuity by the fire alarm control panel using a small electrical current. There are various types of fire alarm systems available in the market but the main two types of fire alarm systems are 1.
The fire alarm diagram can be seen in the figure above.
Misinterpretation of an instruction or guidance note or for the compliance in any complete fire alarm system. 8 zone class a connects either fire initiating devices or security devices 2975 94xx back box 4100u4100es field wiring diagram for 4100 power limited 841 731 or field wiring diagram for 4100 non power limited 841 995 4100es fire alarm system installation guide 574 848 this publication discusses the following topics. This door release supply is not designed to charge batteries of any kind. In a conventional fire alarm system all devices such as detectors sounders and call points are connected to the control panel through separate wire or cable instead of shared one.