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Flash Cards Practice

1. When conductors are installed under at least _______ in. of concrete beneath a building or other structure, they shall be considered outside of a building or other structure.

Question 1 of 25

2. What is the minimum watts (VA), other than name plate rating (whichever is larger) clothes dryers are to be calculated at when doing residential feeder and service calculations?

Question 2 of 25

3. Show window loads shall be computed at 200 volt-amperes per _______ of show window.

Question 3 of 25

4. Fixtures wires shall not be smaller than ________ AWG.

Question 4 of 25

5. What is the minimum vertical clearance from final grade for open overhead service conductors up to 1000 volts over public driveways?

Question 5 of 25

6. If a panel is straight rated 480v what type of rating(s) are the breakers required to have?

Question 6 of 25

7. Service -entrance cables shall be supported at intervals not exceeding _______ inches.

Question 7 of 25

8. In a PV system, a ________ is a device meant to change direct-current input to alternating-current output.

Question 8 of 25

9. Circuit breakers used as switches in 120 volt and 277 volt fluorescent lighting shall be marked.

Question 9 of 25

10. A grounding conductor is what color?

Question 10 of 25

11. What is the minimum length, in feet, for rod and pipe ground electrodes made of specific materials?

Question 11 of 25

12. Where a branch circuit supplies continuous loads or any combination of continuous and non- continuous loads, the minimum branch-circuit conductor size shall have an allowable ampacity not less than the non-continuous load plus ______ of the continuous load.

Question 12 of 25

13. Service - entrance cables shall be supported by straps or other approved means within _______ inches of every service head, goose-neck, or connection to a raceway or enclosure.

Question 13 of 25

14. True or false: It is permissible to use a metal pole supporting a sign cabinet or sign system to enclose the supply conductors.

Question 14 of 25

15. What is the minimum ampacity of the branch-circuit conductors used to supply a 7-1/2 hp, 240 volts, single-phase induction type, ca motor for continuous duty application?

Question 15 of 25

16. For installations to supply only limited loads of a single branch circuit, the branch circuit disconnecting means shall have a rating of not less than _________.

Question 16 of 25

17. How far must the separation be between any light, power, or Class 1 conductors or radio and television conductors, and underground antenna conductors for radio and television receiving equipment?

Question 17 of 25

18. If a warehouse area is 10,000 square feet for storage and uses high pressure sodium lighting, what is the maximum lighting load?

Question 18 of 25

19. Surface-mounted incandescent luminaries (fixtures) installed on the wall above the door or on the ceiling in clothes closets shall have a minimum clearance of ______inches between the luminaire and the nearest point of storage.

Question 19 of 25

20. Type MC cables containing four or fewer conductors, sized no larger than 10 AWG, shall be secured within ________ of every box, cabinet, fitting, or other cable termination.

Question 20 of 25

21. Tap conductors supplying a transformer not over 25' in length, the tap conductor shall have an ampacity rating of at least ________ the rating of the overcurrent protective device.

Question 21 of 25

22. In front of electric equipment, the working space width must be at least ______, or the width of the equipment, whichever is greater.

Question 22 of 25

23. What is the minimum size AWG for festoon lighting?

Question 23 of 25

24. Underground service entrance conductors are not permitted in _____.

Question 24 of 25

25. Live parts of electrical equipment operating at ________ nominal shall be guarded against accidental contact.

Question 25 of 25


 

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