Author Question: Why is the contact surface in relays and contactors coated with a special coating of very conductive ... (Read 63 times)

armygirl

  • Hero Member
  • *****
  • Posts: 556
Why is the contact surface in relays and contactors coated with a special coating of very conductive material?
 
  What will be an ideal response?

Question 2

How can a service technician learn what problems a communicating system has been experiencing?
 
  What will be an ideal response?



softEldritch

  • Sr. Member
  • ****
  • Posts: 334
Answer to Question 1

This coating is very thin but effective in preventing the contacts from becoming quickly damaged from the momentary arc as they open and close. This arc would normally cause the contacts to weld themselves together.

Answer to Question 2

Go to the service screens on the communicating thermostat and read the fault history



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
 

Did you know?

More than 30% of American adults, and about 12% of children utilize health care approaches that were developed outside of conventional medicine.

Did you know?

Computer programs are available that crosscheck a new drug's possible trade name with all other trade names currently available. These programs detect dangerous similarities between names and alert the manufacturer of the drug.

Did you know?

More than 20 million Americans cite use of marijuana within the past 30 days, according to the National Survey on Drug Use and Health (NSDUH). More than 8 million admit to using it almost every day.

Did you know?

Most women experience menopause in their 50s. However, in 1994, an Italian woman gave birth to a baby boy when she was 61 years old.

Did you know?

The most common childhood diseases include croup, chickenpox, ear infections, flu, pneumonia, ringworm, respiratory syncytial virus, scabies, head lice, and asthma.

For a complete list of videos, visit our video library