Grounding

GP B.8.1 - Calculate the maximum fault current from a 120V ground fault that can flow through the earth back to the power supply. The fault will flow to the earth through a 25 ohm resistance ground rod.

GP B.8.2 - A builder is planning on using a #2AWG bare copper conductor that completely encircles the building as a ground ring. How deep does the ground ring need to be buried?

GP B.8.3 - Which of the following will correctly identify the terminal for connection of the grounding conductor?

GP B.8.4 - In the diagram shown, the dashed line represents the location of ground rods. What is the maximum number of ground rods that may be installed if the ground rods alternate (i.e. every other ground rod) between two grounding systems?

GP B.8.5 - What is the minimum size grounded-conductor allowed for a system with 900 kcmil (copper) conductor service-entrance?

GP B.8.6 - What is the primary purpose of grounding an electrical system?

GP B.8.7 - An equipment-grounding conductor (EGC) is used to ground the noncurrent-carrying metal parts of the equipment and to keep that equipment as close as possible to ground potential. The EGC provides a safe path for ground-fault current to flow, protecting circuit elements and equipment and ensuring personnel from electric shock. An EGC is sized based on the __________. The sizing and installation of the EGC must conform to the rules of Sec. 250-122 and Table 250-122.

GP B.8.8 - The National Electrical Code permits which of the following methods to identify an Equipment Grounding Conductor (EGC) larger than No. 6:

GP B.8.9 - A building with a 2/0 service entrance conductor has a grounding system consisting of a #4 copper conductor soldered to an 8 foot long, 1¼” stainless steel ground rod. What part of this system is not code compliant?

GP B.8.10 - The service conductors to a building are 600 kcmil copper. What size copper grounding electrode conductor is required?