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Electrical Theory & Applications for HVACR
©2012 ESCO Group
Student Worksheet
Page 77
Chapter 3: Motors
Name _______________________________
Date _____________________
1. Check a current relay coil and NO contacts using an ohmmeter.
Coil
_________________
Contacts _________________
2. Check the coils and contacts of three potenƟal relays assigned by instructor.
Relay 1:
Coil: ___________ ohms Terminal numbers: ______________
Contact: _________ohms
Relay 2:
Coil ___________ ohms
Terminal numbers: ______________
Contact _________ohms
Relay 3:
Coil: ___________ ohms Terminal numbers: ______________
Contact: _________ohms