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26308-11 Commercial Electrical Services

1. The amount of exterior wall space available to mount service equipment can be found on the ________.

Question 1 of 25

2. The installation of the grounding electrode system is guided by ________.

Question 2 of 25

3. NEC Section 230.54(F. requires the installation of what at the weatherheads?

Question 3 of 25

4. To provide flexibility in a commercial building before the number of tenants is know, the parallel service-entrance conductors should terminate in a ________.

Question 4 of 25

5. Equipment consisting of busbars mounted inside an enclosure that provides a means of tapping the service-entrance conductors is called a ________.

Question 5 of 25

6. A self-contained meter installation refers to ________.

Question 6 of 25

7. The maximum service voltage allowed for cold sequence metering is ________.

Question 7 of 25

8. The two basic types of current transformers are the doughnut and the ________.

Question 8 of 25

9. In a commercial electric service, which component distributes electrical energy through branch circuit breakers?

Question 9 of 25

10. The NEC® requires that all grounding electrodes be ________.

Question 10 of 25

11. The requirements for the location and wiring of CTs and CT cabinets are set by the ________.

Question 11 of 25

12. A service that is supplied from overhead is known as a service ________.

Question 12 of 25

13. An industrial plant using switchgear is most likely to require ________.

Question 13 of 25

14. A group of CTs will normally be used on services of ________.

Question 14 of 25

15. The service grounding conductors are usually routed to and bonded in the ________.

Question 15 of 25

16. The NEC® requirements for the service disconnecting means include that it ________.

Question 16 of 25

17. The conductor or busbar with a higher voltage to ground in a delta-connected four-wire system is also known as the ________.

Question 17 of 25

18. What provides a separation between the service drop conductors and other metal components?

Question 18 of 25

19. The most common electrical service for small commercial or other small loads is ________.

Question 19 of 25

20. The NEC® requires that parallel conductors must be terminated in ________.

Question 20 of 25

21. When terminating conductors with mechanical lugs it is important to ________.

Question 21 of 25

22. The location of distribution and branch circuit panelboards are shown on the ________.

Question 22 of 25

23. NEC Article 376 contains definitions for ________.

Question 23 of 25

24. The requirements for grounding and bonding electric services can be found in ________.

Question 24 of 25

25. When the service is large enough to require numerous branch circuit panelboards, overcurrent protection for individual panel feeders is provided by a ________.

Question 25 of 25


 

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