Electricity Inspection Section#2 The service box, ground and panel Quiz#4

You should have finished Study Session 3 before starting this study session. This study session deals with the conditions that we find related to panels. They are broken down into 6 categories:

• conditions found in all panels
• conditions unique to subpanels
• conditions found with fuses or breakers
• conditions found with fuses only
• conditions found with breakers only
• conditions found with panel wires.

We'll just look at the first 2 categories in this Study Session.

The estimated completion time is one hour.

Objectives
At the end of this study session, you should be able to:

• Identify the common conditions found in main panels and subpanels.
• Describe the causes and implications of these conditions.
• Describe the strategies used to identify the conditions.

• Question 1

  Needs Grading

  	Explain why fused neutrals are a bad idea.
  	Selected Answer: Fused neutrals is bad because when fuses melted, it didn't break the hot wire. The hot wire still have 120 volts voltage. If people touch it without propery grounding, there is electricity shock or life hazard.  Correct Answer:   These are dangerous because the fuse on the neutral side only blows. The circuit may not work, but there may be voltage throughout the entire circuit. Response Feedback: [None Given]

• Question 2

  Needs Grading

  	List 14 conditions found in all panels.
  	Selected Answer: 1. Obsolete and/or fused neutrals 2. damaged panel or components 3. loose panel 4. inappropriate support material 5. loose or missing door 6. openings in panel 7. panel too small 8. overheating 9. rust or water in panel 10. circuits not labeled 11. panel crowded 12. poor access 13. installed upside down 14. not suitable for aluminum wiring 15. poor location 16. outdoor panel not weather-tight Correct Answer: 1. Obsolete and/or fused neutrals 2. Damaged panel or components 3. Loose panel 4. Inappropriate support material 5. Loose or missing door 6. Openings in panel 7. Panel too small 8. Overheating 9. Rust or water in panel 10. Circuits not labeled 11. Panel crowded 12. Poor access 13. Upside down 14. Not suitable for aluminum wiring 15. Poor location 16. Exterior panel not weather-tight Response Feedback: [None Given]

• Question 3

  Needs Grading

  	Should the neutral and the ground wires be bonded together at the subpanel? Why or why not?
  	Selected Answer: No. The ground wire should be idle and only used under emergencies. The neutral wire should carry electricity back every day. Ground wire's ability in working under emergencies is diminished.  Correct Answer:   No. Because electricity may flow through the ground wire under normal circumstances. The ground wire should be reserved for emergency situations. Response Feedback: [None Given]

• Question 4

  Needs Grading

  	What is the implication of a panel that is too small for the service?
  	Selected Answer: There is risk of overheating the panel Correct Answer:   The panel may overheat. Response Feedback: [None Given]

• Question 5

  0 out of 0 points

  	How should the feeder wires to a subpanel from the main panel be protected?
  	Selected Answer:   none of the above Answers: no fusing is necessary the main house fuses or breakers will protect the wire fuses should be provided at the subpanel   fuses should be provided at the main panel none of the above Response Feedback: That's not correct