Which of the following types of grounding electrodes was one of the first grounding electrodes to be End of exam required for use? A. Ground ring B. Concrete-encased C. Water pipe

Select all that apply

1. A14/2 type copper used for a general lighting branch circuit.                                                Ampacity:______________              Maximum Fuse or Circuit Breakers Sizes:________________      2.Three 8 AWG copper conductors with THHN insulation Installed in garage in electrical metallic tubing (EMT). The ambient temperature in the garage can reach as high as 110'F. All termination points for this circuit are rated 60'C.                            Ampacity:______________                  Maximum Fuse or Circuit Breakers Sizes:________________ 3.Four 4 AWG copper conductor with THWN insulation imstalled in EMT in a basement. All termination points are rated at 60'C.                                 Ampacity:______________                  Maximum Fuse or Circuit Breakers Sizes:________________  4. An 8/3 Type UF copper cable installed underground from a house to a detached garage to feed a 120/240-volt subpanel. All termination points are rated at 60'C.…

The term "____" is defined in NEC® Article 100 as "connected to establish electrical continuity and conductivity." Select one: A. BENDED (BENDING) B. BONDED (BONDING) C. SHUNTED (SHUNTING) D. GROUNDED (GROUNDING)

A? Conductor is defined in NEC 240.2 as a conductor, other than a service conductor, having overcurrent protection ahead of its point of supply that exceeds the value permitted for similar conductors that are not taps. A. Faulted b. Tap c. Magnetic d. Copper-like

Explain the relevance of earthing and bonding in an electrical Installation.

b. 63 rule where two different temperatures are encountered for the same conductors 38. An exception to the permits the application of the higher ampacity (lower temperature) if the length of the conductors that enter a higher temperature is not more than 10 ft (3.0 m) or not more than 10% of the total circuit length. C. ampacity rating d. flux rating a. circuit derating b. ampacity derating lood is

4 Describe the various methods of laying underground cables. What are the relative advantages anddisadvantages of each method?

The voltage drop percentage for a panel feeder with a no continuous load of 180A, using 3/0 THWN copper conductors at 480V, three-phase, and a length of 248' is

10. A copper or aluminum busbar that will be connected to many different grounding electrode conductorsshould have a minimum size of _______ inches.A. 3/8 by 2 1/2B. 1/4 by 2C. 3/8 by 1 1/2D. 1/2 by 2