Electricity: Relays, Contactors and Starters (Module 7)
A relay is an electrical switch. It opens and closes under the control of a separate electrical circuit. This topic will explain the workings of a relay.
This course is intended to provide students and practicing technicians with safety information and knowledge related to personal protective equipment. This course is not intended as a sole source of training for HVACR technicians.
CEH 3 CEU 0.3
365 Day Access
Want to Purchase this Course for a Group?
Contact 800-297-5660 for bulk purchases of this course.