Differences Between Class A and Class B IDC Wiring

http://www.froulaalarms.com Learn the difference between Class A and Class B IDC writing in your smoke alarms. Contact Froula Alarm Systems at 206-575-1962 (Seattle, WA). Froula Alarm installs, services, tests and monitors security systems, fire alarms, access control, camera systems, and entertainment systems for both residential and commercial markets. We also provide complete testing for life safety systems including extinguishers, fire sprinklers, and water backflow prevention devices. We are 24/7 and do not subcontract.