Electricity Inspection Section#1 Service Drop & Service Entrance Quiz#4

You should have finished Study Session 3 before starting this study session. This study session discusses service entrance wires.

The estimated completion time is 45 minutes.

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

• Describe which wires are the service entrance.
• Explain how drop loops should be arranged.
• Explain how masts should be arranged.
• Describe common conditions found on service entrance conductors.
• List the causes and implications of these conditions.
• Describe the inspection strategies to identify these problems.

• Question 1

  Needs Grading

  	List 10 common problems with service entrance conductors.
  	Selected Answer: 1. No drip loop 2. No masthead (entrance cap, service cap, pothead, weatherhead) 3. Masthead not weather-tight 4. Service entrance wires too close to the roof  5. Mast or conduit bent 6. Mast or conduit rusted 7. Mast rotted (if wood) 8. Mast, conduit or cable not well secured 9. Mast, conduit or cable not weather-tight 10. Conduit or cable not well sealed at house wall penetration 11. Cable frayed, mechnically damaged or covered by siding Correct Answer: 1. No drip loop 2. No mast head 3. Mast head not weather-tight 4. Service entrance wires too close to the roof 5. Mast or conduit bent 6. Mast or conduit rusted 7. Mast rotted (if wood) 8. Mast conduit or cable not well secured 9. Mast conduit or cable not weather-tight 10. Conduit or cable not well sealed at house/wall penetration 11. Cable frayed, damaged or covered by siding Response Feedback: [None Given]

• Question 2

  Needs Grading

  	List 2 functions of the drip loop.
  	Selected Answer: 1. Prevent water from entering house 2. A sign that service drop wires are supported properly Correct Answer:   1. Prevents water entry into the conduit or service entrance conductors. 2. Shows that the service drop wires are not straining the splices. Response Feedback: [None Given]

• Question 3

  Needs Grading

  	List 3 common areas of water penetration into service entrances.
  	Selected Answer: 1. Service cap 2. roof flashing 3. joints 4. Meter base 5. House entry Correct Answer:   1. Conduit joints 2. Mast head 3. Roof flashing 4. Meter base 5. House entry Response Feedback: [None Given]

• Question 4

  0 out of 0 points

  	The service entrance conductors run from the service _____ to the service _____. [Enter your answers separated by a comma.]
  	Selected Answer:  drop,cap Correct Answer: Evaluation Method Correct Answer Case Sensitivity Exact Match drop,box Exact Match drop, box Response Feedback: That's not correct

• Question 5

  0 out of 0 points

  	All service entrance conductors must be attached to the building above roof level.
  	Selected Answer:  False Answers: True  False Response Feedback: Good work

• Question 6

  0 out of 0 points

  	All service entrance conductors must be in conduit.
  	Selected Answer:  True Answers: True  False Response Feedback: That's not correct

• Question 7

  0 out of 0 points

  	The drip loop should be as close to the roof surface as possible.
  	Selected Answer:  False Answers: True  False Response Feedback: Good work

Electricity Inspection Section#1 Service Drop & Service Entrance Quiz#3

You should have finished Study Session 2 before starting this study session. This study session deals with the service drop.

The estimated completion time is one hour.

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

• Describe the function of the service drop.
• Identify the location of the service drop.
• Explain what makes up a service drop.
• Describe the problems commonly found on the service drop.
• Explain the causes and implications of these problems.
• List he inspection strategies used to identify them.

• Question 1

  Needs Grading

  	How many wires would you typically find in a 240-volt service drop?
  	Selected Answer: 3 Correct Answer:   Three Response Feedback: [None Given]

• Question 2

  Needs Grading

  	List 8 common problems with service drops.
  	Selected Answer: 1. Overhead wires too low 2. Overhead wires too high 3. Damaged or frayed wires 4. Trees or vines interfering with wires 5. Wires too close to doors or windows 6. Wires not well secured to the house 7. Poor connection between the service drop and service entrance 8. Inadequate clearance from roofs 9. Service lateral problems.  Correct Answer: 1. Overhead wires too low 2. Overhead wires too high 3. Damaged or frayed wires 4. Trees of vines interfering with wires 5. Wires too close to doors or windows 6. Wires not well secured to the house 7. Poor connection between service drop and service entrance 8. Inadequate clearance from roofs Response Feedback: [None Given]

• Question 3

  Needs Grading

  	List clearances above ground, swimming pools and roofs applicable to your area.
  	Selected Answer: 20 feet above ground 20 feet above swimming pool 10 feet above roofs Correct Answer: Canada: - above roadway ? 20 ft - above driveway ? 15 ft - above flat roof ? 8-10 ft - above sloped roof ? not usually permitted - above swimming pool ? no specific rule United States: - above roadway ? 18 ft - above driveway ? 12 ft - above flat roof ? 8-10 ft - above sloped roof ? 18 inches - above swimming pool ? 18 ft above and 10 ft away horizontally - 3 feet above sloped roof with pitch greater than 4 in 12 - above walkway ? 10 ft Response Feedback: [None Given]

• Question 4

  Needs Grading

  	What would 2 wires coming into the house usually mean?
  	Selected Answer: 120-volt service Correct Answer:   120 volts service Response Feedback: [None Given]

• Question 5

  Needs Grading

  	What would 4 wires coming into the house mean?
  	Selected Answer: 3 phase 240 volt service Correct Answer:   Three phase electricity Response Feedback: [None Given]

• Question 6

  0 out of 0 points

  	Service laterals are overhead or underground?
  	Selected Answer:   Underground Answers: Overhead   Underground Response Feedback: Good work

• Question 7

  0 out of 0 points

  	The service drop is overhead or underground?
  	Selected Answer:   Overhead Answers:   Overhead Underground Response Feedback: Good work

• Question 8

  0 out of 0 points

  	The drip loop is typically part of the service drop.
  	Selected Answer:  True Answers: True  False Response Feedback: That's not correct

• Question 9

  0 out of 0 points

  	The wire size for the service drop must be the same as the wire size for the service entrance conductors.
  	Selected Answer:  False Answers: True  False Response Feedback: Good work