Electricity Inspection Section#3 The Distribution System Quiz#2

You should have finished Study Session 1 before starting this study session. This study session discusses the common problems found with modern, copper branch-circuit wiring.

The estimated completion time is 30 to 45 minutes.

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

• List 17 common problems with branch circuit wiring.
• Explain their causes and implications.
• Identify these problems in the field.
• Prescribe corrective action for these problems.

• Question 1

  Needs Grading

  	Abandoned wire should be _____.
  	Selected Answer: Removed Correct Answer:   Removed

• Question 2

  Needs Grading

  	Define a grommet.
  	Selected Answer: Grommet is a protection that used to prevent wires from being damaged by steel stud Correct Answer:   A grommet is a fitting that protects cable from the sharp edges of steel studs.

• Question 3

  Needs Grading

  	Give four examples of damaged wire.
  	Selected Answer: 1. Cut or pinched 2. Chewed  3. Burned  4. Cracked insulation Correct Answer:   1. Cut or pinched 2. Chewed on by animals 3. Burned wire 4. Wire with brittle or cracked insulation

• Question 4

  Needs Grading

  	List 17 common branch circuit wire problems.
  	Selected Answer: 1. Damaged 2. Not well secured 3. Loose connections 4. Open splices 5. Wires too close to ducts, pipes, vents, chimneys and flues 6. Wire too close to the edge of studs or joists 7. Wires run through steel studs without protection 8. Exposed wires on walls or ceilings 9. Exposed wires in attics 10. Wire run under carpets 11. Indoor cable used outdoors 12. Buried cable not rated for bured use 13. Overhead wire not stranded 14. Household wiring used as extension cord or extension cord used as permanet wiring 15. Undersized wire 16. Improper color coding 17. Abandoned wire Correct Answer: 1. Damaged 2. Not well secured 3. Loose connections 4. Open splices 5. Wires too close to ducts, pipes, vents, chimneys, and flues 6. Wires too close to the edge of studs or joists 7. Wires run through steel studs without protection 8. Exposed wires on walls or ceilings 9. Exposed wires in attics 10. Wire run under carpets 11. Cable used outdoors 12. Buried cable not rated for buried use 13. Overhead wires not stranded 14. Household wire used as extension cords 15. Undersized wire 16. Improper colour coding 17. Abandoned wire

• Question 5

  Needs Grading

  	List three methods for securing wire ends.
  	Selected Answer: 1. Strain relief clamps 2. Staple Correct Answer:   1. Terminal screws 2. Push-in connectors 3. Solderless connectors

• Question 6

  Needs Grading

  	What is meant by open splice?
  	Selected Answer: connections that are not in box Correct Answer:   An open splice is a connection that is not made inside a junction box.

• Question 7

  Needs Grading

  	What is the problem with running wire across the top of the attic ceiling joists?
  	Selected Answer: It is easy to be stepped on.  Correct Answer:   Because they are not visible and may be stepped on

• Question 8

  Needs Grading

  	Wires should not be run on wall surfaces without _______________.
  	Selected Answer: protectioni Correct Answer:   Mechanical protection

• Question 9

  0 out of 0 points

  	Wire should be _____ inch(es) away from ducts and pipes.
  	Selected Answer:   1 Correct Answer:   1

• Question 10

  0 out of 0 points

  	Wire should be _____ inch(es) away from the edge of studs.
  	Selected Answer:   1 ¼ Correct Answer:   1 ¼