Electricity Inspection Section#1 Service Drop & Service Entrance Quiz#5

You should have finished Study Session 4 before starting this study session. This study session discusses the size of the electrical service.

The estimated completion time is 45 minutes.

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

• Explain the implications of an undersized service.
• Identify common service sizes.
• State the wire sizes appropriate for various service sizes.
• Explain how to determine the service size.
• Describe what to instruct your client based on your service size conclusions.

• Question 1

  Needs Grading

  	What is the largest single-phase service that you are likely to find in a home?
  	Selected Answer: 400-amp Correct Answer:   400-amps Response Feedback: [None Given]

• Question 2

  Needs Grading

  	What size wire would you expect to find on the service entrance for a 60-amp service? __________. A 100-amp service? __________. A 200-amp service? __________. (Give the appropriate answer for your area.)
  	Selected Answer: 60-amp = 6 AWG gauge 100-amp = 4 AWG gauge 200-amp = 2/0 AWG gauge Correct Answer:   - 60-amp: 6 gauge - 100-amp: 4 gauge (U.S.), 3 gauge (Canada) - 200-amp: 2-0 gauge (U.S.), 3-0 gauge (Canada) Response Feedback: [None Given]

• Question 3

  0 out of 0 points

  	Roughly 999 out of 1,000 houses have _____ service entrance wires (insert a number).
  	Selected Answer:  3 Correct Answer: Evaluation Method Correct Answer Case Sensitivity Exact Match 3 Response Feedback: Good work

• Question 4

  0 out of 0 points

  	Roughly 999 out of 1,000 houses have _____ volts available (insert a number).
  	Selected Answer:  240 Correct Answer: Evaluation Method Correct Answer Case Sensitivity Exact Match 240 Response Feedback: Good work

• Question 5

  0 out of 0 points

  	Implications of an undersized service include:
  	Selected Answer:   nuisance tripping of the main fuses or breakers Answers: shock hazard fire hazard shock and fire hazard melting insulation   nuisance tripping of the main fuses or breakers Response Feedback: Note: Unless there is overfusing as well, in which case there is a fire hazard. Good work

• Question 6

  0 out of 0 points

  	Is a 60-amp service ever acceptable?
  	Selected Answer:   Yes Answers:   Yes No Response Feedback: Yes, on small homes without many large electrical appliances.

• Question 7

  0 out of 0 points

  	The main fuses or breakers are most likely to trip:
  	Selected Answer:   when many large appliances are on Answers: during cold weather during hot weather after 11:00 p.m.   when many large appliances are on when most of the lights are on Response Feedback: Good work

• Question 8

  0 out of 0 points

  	Which of the following is a reliable way to identify the service size?
  	Selected Answer:   the service entrance wires Answers: the size of the service drop wires the distribution panel rating the service box rating   the service entrance wires the service entrance conduit Response Feedback: Good work

• Question 9

  0 out of 0 points

  	Which of the following is a safety issue?
  	Selected Answer:   the main fuses have a higher rating than the service entrance wire Answers: the main fuses have a lower rating than the service entrance wire   the main fuses have a higher rating than the service entrance wire the service box has a higher rating than the service entrance wires the service box has the same rating as the service entrance wires the distribution panel has a larger rating than the service entrance wires Response Feedback: Good work

• Question 10

  0 out of 0 points

  	A 200-amp service will have two 100 fuses in the service panel.
  	Selected Answer:  False Answers: True  False Response Feedback: Good work

• Question 11

  0 out of 0 points

  	Aluminum is an acceptable service entrance conductor material.
  	Selected Answer:  True Answers:  True False Response Feedback: Good work

• Question 12

  0 out of 0 points

  	If you can't read the size of the fuses in the service box, you should remove them to try and get a better look.
  	Selected Answer:  False Answers: True  False Response Feedback: Good work

• Question 13

  0 out of 0 points

  	Load calculations are a regular part of a home inspection.
  	Selected Answer:  False Answers: True  False Response Feedback: Good work

• Question 14

  0 out of 0 points

  	The size of the electrical service has to be reported according to ASHI Standards.
  	Selected Answer:  False Answers:  True False Response Feedback: That's not correct