Fire Alarm Class B Circuits Explained

The information in this video is intended to help industry technicians with the installation, maintenance, and testing of fire alarm systems. In this video we define a Class B circuit, discuss how these circuits work, expalin the roll of diodes in notification appliance circuits (NAC) and how to test all of these functions with a digital multimeter.

[@bretbuck8173]

Being a 1st year electrician this is putting me steps ahead of other guys thank you ( installing new fire alarm systems in schools)

[@EdgarParedes.127]

Thank you for posting this. I switched from data to fire, and this is making a huge difference

[@wstxantern]

Helpful

[@PyrotexSystems]

Glad to hear that

[@FirealarmsAndTrains]

Why do fire alarm transformers get so hot to the touch and hum so loud. Is it normal? Have a Fahrenheit IFP-75